SQUARE ROOT VALUE WITHOUT USING LIBRARY FUNCTION

/* SQUARE ROOT VALUE WITHOUT USING LIBRARY FUNCTION */

#include<stdio.h>
#include<conio.h>
main()
{
float num,sqtval,temp;
clrscr();
printf("\n Enter a number: ");
scanf("%f",&num);
sqtval=num/2;
temp=0;
while(sqtval!=temp)
{
temp=sqtval;
sqtval=(num/sqtval+sqtval)/2;
}
printf("\n sqroot of %f number is %f ",num,sqtval);
getch();
}

OR

#include<stdio.h>

#include<conio.h>

main()

{

int i, num;

clrscr();

printf("\n Enter a number: ");

scanf("%d",&num);

for(i=1; i<=num; i++)

{

if(i*i == num)

{ 

printf("\n square root value = %d",i);

break;

}

}

getch();

}