/* C progarm to compute the square root of a given number */
#include <stdio.h>
#include <math.h>
int main(void)
{
float m, f,s;
printf("\n Enter the number: ");
scanf("%f",&m);
/* Checking for negative input */
if(m<0)
{
printf("\n Negative Input For Computing Square Root Is Not Allowed");
return 0;
}
s=m/2; /* Set the initial guess */
do
{
f=s;
s=(f+m/f)/2; /* Compute the next estimate for the square root */
}while(fabs(f-s)>=0.000001);
printf("\n Square root of %g is %g\n",m,s);
getch();
return 0;
}
Enter the number: 36
Square root of 36 is 6
First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.