use the %E in printf() to display scientific-notation numbers : float Display « Data Type « C Tutorial

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

#include <stdio.h>
 
int main()
{
    float lightyear = 5.878E12;
    float jupiter = 483400000;
    float distance;
 
    distance = jupiter/lightyear;
 
    printf("Jupiter is %E light years from the sun.\n",distance);
 
    return(0);
}

Jupiter is 8.223886E-005 light years from the sun.