I am writing a program in C which need to calculate the square root of a given number. Is there any square root function available in C library. How to implement it ?
You don’t have to write functions for everything in C , it comes with some library function already available , you only need to use them by passing correct parameters and including the header files.
For using the square root function in C , <math.h> header file is required to be included in your program.
The declaration of sqrt function is:
double sqrt(double x)
 Here is a sample program to use square root function in a C program.
 Addition tip for users with GCC compiler(default on Linux distribution)
while compiling the file use the -lm tag at the end of command.
For e.g if the name of file is square.c , you can compile it by writing cc square.c -lm
