what are library functions

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Amar Kumar 8 years, 4 months ago
C Standard library functions or simply C Library functions are inbuilt functions in C programming.
The prototype and data definitions of the functions are present in their respective header files, and must be included in your program to access them. For example: If you want to use printf() function, the header file <stdio.h><stdio.h> should be included.</stdio.h>
<stdio.h>The C language is accompanied by a number of standard library functions which carry out various useful tasks. In particular, all input and output operations (e.g., writing to the terminal) and all math operations (e.g., evaluation of sines and cosines) are implemented by library functions. </stdio.h>
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