To create precision with floating-point numbers : float Display « Data Type « C Tutorial

1. C Tutorial
2. Data Type
3. float Display

%.2f displays only two zeroes after the decimal point.

#include <stdio.h>

main(){
    printf("%.1f", 3.123456);
    printf("\n%.2f", 3.123456);
    printf("\n%.3f", 3.123456);
    printf("\n%.4f", 3.123456);
    printf("\n%.5f", 3.123456);
    printf("\n%.6f", 3.123456);

}

3.1
      3.12
      3.123
      3.1235
      3.12346
      3.123456