trunc() : Truncation of number

trunc(x) 

Example with float as inputs

#include <stdio.h>
#include <math.h>
int main(void){
     double    x,y;
     x=trunc(13.345);
     y=trunc(-12.456);

     printf("x=%lf , y=%lf", x,y);
     return 0;
}

x=13.000000, y=-12.000000

Example with float variables by using truncf()

#include <stdio.h>
#include <math.h>
int main(void){
     float x,y;
     x=truncf(13.345);
     y=truncf(-12.456);
     printf("x=%f , y=%f", x,y);
     return 0;
}

x=13.000000, y=-12.000000

Example by using truncl()

#include <stdio.h>
#include <math.h>
int main(void){
     float  x,y;
     x=truncl(13.345);
     y=truncl(-12.456);
     printf("x=%f , y=%f", x,y);
     return 0;
}

x=13.000000, y=-12.000000