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 float in C

#include <stdio.h>

int main (){
    float a;
    printf("
Enter a real number here please: ");
    scanf("%f",&a);
    
    printf("
Printing Number with different precision: ");
    printf("
  Number default precision: %f", a);
    printf("
  Number in (0 d.p.): %.0f", a);
    printf("
  Number in (1 d.p.): %.1f", a);
    printf("
  Number in (2 d.p.): %.2f", a);
    printf("
  Number in (3 d.p.): %.3f", a);
    printf("
  Number in (3 d.p.): %.4f", a);
    return 0;
}

round C

float f = 0.5;

round(f);