C library functions are provided by the system and stored in the library. In C programming, C library functions are also called inbuilt functions.
To use Inbuilt Function in C, you must include their respective header files containing prototypes and data definitions.
C Program to Demonstrate the Use of Library Functions
Example:
#include<stdio.h>#include<ctype.h>#include<math.h>void main(){ int i = -10, e = 2, d = 10; //Variables Defining and Assign values float rad = 1.43; double d1 = 3.0, d2 = 4.0; printf("%d\n", abs(i)); printf("%f\n", sin(rad)); printf("%f\n", cos(rad)); printf("%f\n", exp(e)); printf("%d\n", log(d)); printf("%f\n", pow(d1, d2)); }Program Output:
