C – trunc() function

• trunc( ) function in C truncates the decimal value from floating point value and returns integer value.
• ”math.h” header file supports trunc( ) function in C language. Syntax for trunc( ) function in C is given below.

double trunc (double a);
float truncf (float a);
long double truncl (long double a);

Example program for trunc( ) function in C:

#include <stdio.h>      
#include <math.h>      

int main()
{
   printf ("truncated value of 16.99 = %f\n", trunc (16.99) );
   printf ("truncated value of 20.1  = %f\n", trunc (20.1) );
   return 0;
}

Output:

truncated value of 16.99 = 16.000000 truncated value of 20.1 = 20.000000