C

c round function

   #include <math.h>

   double round(double x);
   float roundf(float x);
   long double roundl(long double x);

round function in C

 #include <stdio.h>
#include <math.h>
 int main()
{
       float i=5.4, j=5.6;
       printf("round of  %f is  %f
", i, round(i));
       printf("round of  %f is  %f
", j, round(j));
       return 0;
}

round C

float f = 0.5;

round(f);