prime number using square root -asr

prime number c program using square root function -asr

#include <stdio.h>
#include <conio.h>
#include <math.h>

void main(){
     int i,n,r,a=0;
clrscr();
printf("Enter number\n");
scanf("%d",&n);


if(n%2==0||n%3==0||n%5==0||n%7==0)
    {
  r=1;
  goto check;
    }

for(i=11,a=1;i<=(int)sqrt(n);i=i+2,a++)
         {

             if(n%i==0)
                                {
                                  r=1;
                                break;
                                }
           }

check:
printf("Loop runned %d times\n",a);

if(r==1)
printf("number is not prime");
else
printf("number is prime");


getch();
}



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