Answer Posted / amit kumar

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int n,flag=0,ctr;
printf("enter the number to be checked\n");
scanf("%d",&n);
for(ctr=2;ctr<=sqrt(n);ctr++)
{
if(n%ctr==0)
{
flag=1;
break;
}
}
if(flag==0)
printf("the given number is prime\n");
else
printf("the given number is not prime\n");
getch();
}

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