Thread: Radius formula help

to get radius is = squareroot area / pie
the heck do i get squareroot?
what is the secret formula for squareroot?

Code:

#include<stdio.h>
#include<conio.h>
main()
{
    clrscr();
    int area;
    float r;
    printf("\nEnter area of the circle:");
    scanf("%d",&area);
    r = 3.14/area;
    printf("\nThe radius of the circle is %f",r);
    getch();
    return(0);
}