Square root function

#include<stdio.h>
#include<math.h>
#include<conio.h>
//C sqrt() Function
int main()
{
   /*The square root is therefore an nth root with .
    any positive real number has two square roots, one positive and one negative */
    double num,result;
    printf(" Enter any number : \n");
    scanf("%lf",&num);

    result=sqrt(num);
    printf("square root of %.2lf= %.1lf",num,result);
    return 0;
}