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C function to format and output text
printf is a C standard library function and is also a Linux terminal (shell) command that formats text and writes it to standard output. The function accepts
Printf
Shell command for formatting and outputting text; like printf() library function
printf is a shell command that formats and outputs text like the same-named C function. It is available in a variety of Unix and Unix-like systems. Some
Printf_(Unix)
GNU replacement for the Bourne shell
Group $ printf '<newline>: <%b>\n' $'\n' <newline>: < > $ printf '<tab>: <%b>\n' $'\t' <tab>: < > $ printf '<space>: <%s>\n' " " <space>: < > $ printf '<NUL>:
Bash_(Unix_shell)
Formatting to make code or markup easier to read
k){if(k<1||k>2){printf("out of range\n"); printf("this function requires a value of 1 or 2\n");}else{ printf("Switching\n");switch(k){case 1:printf("1\n");break;case
Pretty-printing
Unix system call for querying file metadata
exit(EXIT_FAILURE); } printf("%s:\n", argv[i]); printf("\tinode: %u\n", sb.st_ino); printf("\tperms: %o\n", sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO)); printf("\tlinks:
Stat_(system_call)
Fixing defects in an engineered system
into the source code. The latter is sometimes called printf debugging, due to the use of the printf function in C. This kind of debugging was turned on
Debugging
Computer bug exploit caused by invalid data
"Password1"; printf("Enter an integer\n"); scanf("%d", &number); printf("Please enter a string\n"); fgets(input, sizeof(input), stdin); printf(input); printf("\n");
Code_injection
General-purpose programming language
original version was: main() { printf("hello, world\n"); } A more modern version is: #include <stdio.h> int main(void) { printf("hello, world\n"); } The first
C_(programming_language)
Connected input and output streams for computer programs
System.out.printf("Number is: %d%n", number); // Read input for a name and age: Scanner input = new Scanner(System.in); System.out.printf("%nEnter name:
Standard_streams
Family of backward-compatible assembly languages
compiled ; against the C Standard Library extern printf ; declares the use of external symbol, as printf ; printf is declared in a different object-module. ;
X86_assembly_language
Topics referred to by the same term
%s may refer to: %s, in printf format string %s, in scanf format string %s, seconds in the strftime format string %s, used to check the Unix timestamp
%s
GNU internationalization and localization software
clutter, this function is commonly aliased to _: printf(gettext("My name is %s.\n"), my_name); printf(_("My name is %s.\n"), my_name); // same, but shorter
Gettext
Shell command for writing to standard output
and back to Normal ${NORMAL}" Portably with printf: BGRED=`printf '\33[41m'` NORMAL=`printf '\33[m'` printf '%s\n' "${BGRED}Text on red background${NORMAL}"
Echo_(command)
Data types supported by the C programming language
functionality of the types defined in the <stdint.h> header. It defines macros for printf format string and scanf format string specifiers corresponding to the types
C_data_types
Type of software vulnerability
string parameter in certain C functions that perform formatting, such as printf(). A malicious user may use the %s and %x format tokens, among others, to
Uncontrolled_format_string
bash shell or printing IFS with commands like printf %s "$IFS" | od -c, printf "%q\n" "$IFS" or printf %s "$IFS" | cat -A (the latter two commands being
Input_Field_Separators
Programming language
:= shp.(Square) // Asserts Square type on shp, should work if ok { fmt.Printf("%#v\n", square) } else { fmt.Println("Can't print shape as Square") } and
Go_(programming_language)
Operations transforming individual bits of integral data types
0; i--) { putchar(x & (1u << i) ? '1' : '0'); } printf("\n"); } int main( void ) { int j = 5225; printf("%d in binary \t\t ", j); showbits(j); /* the loop
Bitwise_operations_in_C
Tool of editors for programming, scripting, and markup
#include <stdio.h> int main() { printf("Hello World\n"); return 0; } // Hello World #include <stdio.h> int main() { printf("Hello World\n"); return 0; }
Syntax_highlighting
Graphical representation of a computer program or algorithm
print_within_parentheses(const char *p) { printf("("); // 1 if (p != NULL) { // 1 printf("%s", p); // 2 } // 2 printf(")"); // 3 } This function has three
Control-flow_graph
Canadian electronic musician
including Salt, 7 sevens.med, Shitfuckers!, and his fourth studio album, printf("shiver in eternal darkness/n");. Funk then moved to using a PC sometime
Venetian_Snares
Header file for C programs
skipping first()'s call of printf(). #include <setjmp.h> #include <stdio.h> static jmp_buf buf; void second() { printf("second\n"); // prints longjmp(buf
Setjmp.h
Software documentation on Unix systems
for reading printf(3C) is: man -s 3c printf On Linux and BSD derivatives the same invocation would be: man 3 printf which searches for printf in section
Man_page
Loop transformation technique
(repeat--) { printf("process(%d)\n", i); printf("process(%d)\n", i + 1); printf("process(%d)\n", i + 2); printf("process(%d)\n", i + 3); printf("process(%d)\n"
Loop_unrolling
Form of text that defines C code
(num) { case 1: printf("Number is 1\n"); break case 2: printf("Number is 2\n"); break; case 3: printf("Number is 3\n"); break; default: printf("Number is not
C_syntax
C/C++ programming idiom
value2; int value3; void variables() { printf("%s = %d\n", "value1", value1); printf("%s = %d\n", "value2", value2); printf("%s = %d\n", "value3", value3); }
X_macro
Bottom-up parser that interprets an operator-precedence grammar
continue; case ')': printf("))))"); continue; case '^': printf(")^("); continue; case '*': printf("))*(("); continue; case '/': printf("))/(("); continue;
Operator-precedence_parser
Keyword used in some programming languages to tag variables
be created on stack int a = 10; int b = 100; int c = 0; int d = 0; /* "printf" will be called with arguments "%d" and 110 (the compiler computes the sum
Volatile (computer programming)
Volatile_(computer_programming)
Printf-like function for the Linux kernel
printk is a printf-like function of the Linux kernel interface for formatting and writing kernel log entries. Since the C standard library (which contains
Printk
Control parameter used in programming languages
68. Input format strings are complementary to output format strings (see printf), which provide formatted output (templating). Mike Lesk's portable input/output
Scanf
Software debugger
in C: #include <stdio.h> int main(void) { char msg = "Hello, world!\n"; printf("%s", msg); return 0; } Using the clang compiler on macOS, the code above
LLDB_(debugger)
System call to examine the status of file descriptors of open input/output channels
sizeof(master)); printf("running select()\n"); int nready; if (nready = select(maxfd + 1, &readfds, NULL, NULL, NULL) == -1) { die("select()"); } printf("Number
Select_(Unix)
Topics referred to by the same term
placeholder, used in computing to format strings within print functions (printf). Line stander, a person standing in a queue for another. Placeholder (politics)
Placeholder
Header file for C programs
ellipsis in place of the last parameter. An example of such a function is printf. Respectively, declarations and definitions are done similarly as such int
Stdarg.h
Base-16 numeric representation
represents the Esc control character) and to output an integer as hex via printf-like function, the format conversion code %X or %x is used In URIs (including
Hexadecimal
Execution model which allows for parallel computing
NUM_THREADS; printf("Thread %d: Started.\n", index); printf("Thread %d: Will be sleeping for %d seconds.\n", index, sleep_time); sleep(sleep_time); printf("Thread
Pthreads
C library function for parsing command-line options
{ printf("digits occur in two different argv-elements.\n"); } digit_optind = this_option_optind; printf("option %c\n", c); break; case 'a': printf("option
Getopt
Replacing placeholders in a string with values
concatenation, which requires repeat quoting and unquoting; or substituting into a printf format string, where the variable is far from where it is used. Consider
String_interpolation
Method used for display options on video text terminals
such as with make ; flasher . flasher () { while true; do printf '\e[?5h'; sleep 0.1; printf '\e[?5l'; read -s -n1 -t1 && break; done; } The following
ANSI_escape_code
GNU implementation of the standard C library
APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt, login, exit and more. The glibc
Glibc
Computer program or file valid in multiple programming languages or file formats
#define main() int main(void) #define printf printf( #define true ) #define function function main() { printf "Hello, world!\n"true/* 2> /dev/null |
Polyglot_(computing)
General-purpose programming language
Python has a "string format" operator % that functions analogously to printf format strings in the C language—e.g. "spam=%s eggs=%d" % ("blah", 2) evaluates
Python_(programming_language)
General-purpose, object-oriented programming language
[self integer]; for (i = 0; i < x; i++) { printf("*"); } printf("\n"); return self; } - (id) showint { printf("%d\n", [self integer]); return self; } @end
Objective-C
Traditional first example of a computer programming language
memorandum by Brian Kernighan, Programming in C: A Tutorial: main( ) { printf("hello, world"); } In the above example, the main( ) function defines where
Hello,_world
Instructions a computer can execute
primitives are max() and min(). The driver function is range(). For example, printf("%d", range(10, 4, 7)); will print 6. Functional languages are used in computer
Computer_program
Concise notation for large or small numbers
to be decimal. This notation can be produced by implementations of the printf family of functions following the C99 specification and (Single Unix Specification)
Scientific_notation
Synchronization method in parallel computing
pthread_mutex_destroy(&(bar->lock)); } void *thread_func([[maybe_unused]] void *p) { printf("Thread ID %ld is waiting at barrier, as insufficient (%d) threads are running
Barrier_(computer_science)
Java library
CLibrary.class); void printf(String format, Object... args); } public static void main(String[] args) { CLibrary.INSTANCE.printf("Hello, World\n"); for
Java_Native_Access
Input/output functionality in the C programming language
fclose(fp); return EXIT_FAILURE; } fclose(fp); printf("The bytes read were: "); for (size_t i = 0; i < len; ++i) { printf("%02X ", (unsigned char)buffer[i]); }
C_file_input/output
Memory map - POSIX-compliant system call
case 0: childpid = getpid(); printf("PID %d:\tanonymous %s, zero-backed %s\n", childpid, anon, zero); sleep(3); printf("PID %d:\tanonymous %s, zero-backed
Mmap
Programmable text editor
hello.c with the following contents: int main(int argc, char **argv) { printf("Hello world!\n"); return 0; } ... one could use the following TECO session
TECO_(text_editor)
Self-replicating program
for (int i = 0; i < l.length; i++) { // Print string array", " System.out.printf(\"%s%c%s%c,%n\", l[4], q, l[i], q);", " }", " for (int i = 5; i < l.length;
Quine_(computing)
External instruction to a computer program
conditional. For example, printing a message in Bash is via the command printf, while in Python it is via the function print(). Further, some aspects of
Command_(computing)
Microsoft programming language
type fields Extensions to array slicing Type inference enhancements 4.0 Printf on unitized values Extension property initializers Non-null provided types
F Sharp (programming language)
F_Sharp_(programming_language)
Class of type systems
types of methods: # let y = object method get_x = 2 method set_x y = Printf.printf "%d\n" y end;; val y : < get_x : int; set_x : int -> unit > = <obj>
Structural_type_system
Script written for an operating system shell
automatically: #!/bin/sh printf 'compiling...\n' cc -c foo.c cc -c bar.c cc -c qux.c cc -o myprog foo.o bar.o qux.o printf 'done.\n' The script would
Shell_script
Programming idiom
loop" without halting, in C: #include <stdio.h> int main() { for (;;) { printf("Infinite loop\n"); } return 0; } The form for (;;) for an infinite loop
Infinite_loop
Programming statement for branching control based on a value
(age) { case 0: printf("You're newborn!"); break; case 1: printf("You're one."); break; case 2: printf("You're two."); break; case 3: printf("You're three
Switch_statement
Computer programming, a variable accessible throughout a computer program
file-scope variable. printf("%d\n", shared); changeShared(); printf("%d\n", shared); localShadow(); printf("%d\n", shared); paramShadow(1); printf("%d\n", shared);
Global_variable
Family of programming languages
algol68 test: ( real a,b,c,d; # printf – sends output to the file stand out. # # printf($p$); – selects a new page # printf(($pg$,"Enter d:")); read(d);
ALGOL
Text processor used with C and C++ and other programming tools
'stdio.h' in which the function printf() and other symbols are declared. #include <stdio.h> int main(void) { printf("Hello, World!\n"); return 0; } In
C_preprocessor
Special characters in computing signifying the end of a line of text
automatically inserted when using the format specifier %n in System.out::printf. Example: String eol = System.lineSeparator(); String lineColor = "Color:
Newline
Foreign function interface for the Java language
stdlib = linker.defaultLookup(); MethodHandle printf = linker.downcallHandle( stdlib.findOrThrow("printf"), FunctionDescriptor.of(ValueLayout.JAVA_INT
Java_Native_Interface
Process that is not running, but is in the process table
pids[i] = fork(); if (pids[i] == 0) { printf("Child%d\n", i); sleep(i + 1); _exit(0); } } for (i = 9; i >= 0; --i) { printf("parent%d\n", i); waitpid(pids[i]
Zombie_process
Function with variable number of arguments
variadic function in many languages is output formatting. The C function printf and the Common Lisp function format are two such examples. Both take one
Variadic_function
Symbol for the fraction of a hundred
functions such as printf and scanf), the percent sign denotes parts of the template string that will be replaced with arguments. (See printf format string
Percent_sign
Microsoft's core set of application programming interfaces on Windows
their first assignment. The working part of the program is only a single printf line within the main subroutine. The overhead for linking to the standard
Windows_API
User-friendly interactive Unix shell
commandline". GitHub. Retrieved 9 April 2021. Nordal, Andreas (11 July 2013). "printf does not support \e". fish issues. Retrieved 24 March 2016. Official website
Fish_(Unix_shell)
Standard library for the C programming language
C functions are also made available in namespace std (e.g., C printf as C++ std::printf, atoi as std::atoi, feof as std::feof), by including header <chdrname>
C_standard_library
Ability of a process to examine and modify itself
(*Method)(void*); // The method: Foo::printHello void Foo_printHello(void* _) { printf("Hello, world!\n"); } // Simulated method table typedef struct { const char*
Reflective_programming
Programming language
get invoked) } } void callback_a() { stdout.printf("Callback A\n"); } void callback_b() { stdout.printf("Callback B\n"); } void main() { var foo = new
Vala_(programming_language)
Software coverage tool
for (i = 1; i < 10; i++) { if (i % 3 == 0) printf ("%d is divisible by 3\n", i); if (i % 11 == 0) printf ("%d is divisible by 11\n", i); } return 0;
Gcov
Storage size operator in C and C++
type is four bytes long, the following code fragment prints 1,4: char c; printf("%zu,%zu\n", sizeof c, sizeof(int)); Certain standard header files, such
Sizeof
Unary operators that add or subtract one from their operand, respectively
<stdio.h> int main() { int c = 2; printf("%d\n", c++); // this statement displays 2, then c is incremented by 1 to 3. printf("%d", ++c); // this statement
Increment and decrement operators
Increment_and_decrement_operators
Type of data able to be returned by a function or method
return type of void is used in some programming languages: void sayHello() { printf("Hello, world!"); } A method returns to the code that invoked it when it
Return_type
Microsoft's implementation of the shared library concept in Windows and OS/2
b); int main(int argc, char *argv[]) { double result = AddNumbers(1, 2); printf("The result was: %f\n", result); return 0; } The following examples show
Dynamic-link_library
Command in Unix-like operating systems
i in {1..9999} ; do printf -- '%010d\t%s\t%s\t%s\n' "$((2*i*(i+1)+1))" "$i" "$((i+1))" ; done) <(for i in {1..9999} ; do printf -- '%010d\t%s\n' "$((i**2))"
Join_(Unix)
Mandatory Paginate or columnate files for printing Version 1 AT&T UNIX printf Shell programming Mandatory Write formatted output 4.3BSD-Reno prs SCCS
List_of_POSIX_commands
Programming language evaluation rules
args) { Box a = new Box(1); Box b = new Box(2); swap(a, b); System.out.printf("a = %d, b = %d%n", a.value, b.value); // output: a = 2, b = 1 } } where
Evaluation_strategy
Anti-pattern in software development
<stdio.h> void fn() { printf("Entering fn\n"); // ... } void fn2() { printf("Entering fn2\n"); // ... } // ... void fnN() { printf("Entering fnN\n"); //
Shotgun_surgery
Text processing programming language
% 4 == 3 { printf "%6d %s\n", NR, $0 } The action statement prints each line numbered. The printf function emulates the standard C printf and works similarly
AWK
Command line network statistics tool
machine. Some versions of netstat lack explicit field delimiters in their printf-generated output, leading to numeric fields running together and thus corrupting
Netstat
C programming language standard, current revision
appear in compound literal definition. Add %b binary conversion specifier to printf() function family. Add %b binary conversion specifier to scanf() function
C23_(C_standard_revision)
Collection of GNU utilities ported to Windows
mkdir mkfifo mknod mv mvdir nl od paste patch pathchk pclip pr printenv printf ptx pwd recode rm rman rmdir sdiff sed seq sh sha1sum shar sleep sort split
UnxUtils
Asynchrony and awaiting feature in programming languages
sub_task(__async__, void* arg) { int n = (int)(size_t)arg; for (int i = 0; i < 5; ++i) { printf("task %d, delay seconds = %d, i = %d\n", n, n, i); s_task_msleep(__await__
Async/await
PHP driver for MySQL databases
WHERE id = 1"); $row = $res->fetch_assoc(); printf("id = %s (%s)\n", $row['id'], gettype($row['id'])); printf("label = %s (%s)\n", $row['label'], gettype($row['label']));
MySQLi
Shell command for scheduling periodic jobs
the default shell for the cron user is Bourne shell compliant: 1 0 * * * printf "" > /var/log/apache/error_log This example runs a shell program called
Cron
Local search algorithm
{ printf("%s = [", pathName.c_str()); for (int i = 0; i < path.size(); i++) { if (i % 10 == 0) { printf("\n "); } if (i < path.size() - 1) { printf("[%
2-opt
Application programming interface
sprintf(), memcpy() and floor(). Other common procedures like malloc(), printf(), scanf() are missing (the first because it does not specify a heap to
Windows_Native_API
Common Lisp function that produces formatted text
among distinct commands in some other programming languages, such as C's printf for console output, sprintf for string formatting, and fprintf for file
Format_(Common_Lisp)
Software metric used to measure the size of a computer program
ambiguity encountered when determining SLOC: for (int i = 0; i < 100; i++) printf("hello"); /* display one hundred greetings */ In this example we have: 1
Source_lines_of_code
Programming technique to restrict a class to a single instance
} return instance; } public void executeQuery(String sql) { System.out.printf("Executing: %s%n"); } } // a tightly-coupled consumer class class OrderService
Singleton_pattern
Address to memory outside immediate vicinity
far *)0x55550005; char far *q = (char far *)0x53332225; *p = 80; (*p)++; printf("%d", *q); return 0; } Output of the following program: 81; Because both
Far_pointer
Algebraic modeling language
code printf "The optimal production per day is:\n"; printf " %.1f pallets of product A,\n",x1; printf " %.1f pallets of product B \n",x2; printf "This
GNU_MathProg
Notation for ranges or parent directory
as: // prints "numbers 5 10 15" printf("numbers %i %i %i", 5, 10, 15); // prints "input string another string, 0.5" printf("input string %s, %f", "another
Ellipsis (computer programming)
Ellipsis_(computer_programming)
Programming language
(year_size -. float people) /. year_size *. prob in if prob < 0.5 then Printf.printf "answer = %d\n" (people+1) else birthday_paradox prob (people+1) ;;
OCaml
Finite state machine compiler
action dgt { printf("DGT: %c\n", fc); } action dec { printf("DEC: .\n"); } action exp { printf("EXP: %c\n", fc); } action exp_sign { printf("SGN: %c\n"
Ragel
Extent to which a programming language discourages type errors
integer is something like printf("%d", 12), where the %d tells printf at run-time to expect an integer argument. (Something like printf("%s", 12), which tells
Type_safety
American technology and apparel company
Vistaprint Zazzle "Interview with Michael Nemeroff, CEO and co-founder at Printfly". USA Weekly. 28 February 2018. Retrieved 12 October 2018. Mastrull, Diane
RushOrderTees
Rules defining correctly structured Java programs
} { System.out.printf("%s: instance block runtime%n", MyAbstractClass.class.getName()); } public AbstractClass() { System.out.printf("%s: constructor
Java_syntax
PRINTF
PRINTF
PRINTF
PRINTF
Girl/Female
Tamil
Srijla | à®·à¯à®°à¯€à®œà®²à®¾
Beautiful
Girl/Female
Tamil
Shivanshi | ஷிவாநà¯à®·à¯€
A part of Shiv
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Mythological, Oriya, Sanskrit, Tamil, Telugu
The First Born Baby of Kunti; Gentlemen; A Warrior; Instrument; Son of Sun
Surname or Lastname
Dutch and German
Dutch and German : from a pet form of Nick, a short form of the personal name Nikolaus (see Nicholas).English : variant spelling of Nichol.
Girl/Female
Indian, Modern
A Precious Stone
Girl/Female
Hindu, Indian
Rays of Gods
Girl/Female
Arabic, Muslim
Sweet-smelling; Precious; Valuable; Fragrant
Surname or Lastname
English
English : habitational name from a minor place so named.
Boy/Male
Hindu, Indian, Traditional
New Lamp
Girl/Female
Indian, Punjabi, Sikh
Very Beautiful and Intelligent
PRINTF
PRINTF
PRINTF
PRINTF
PRINTF