gistfile1.txt

#include <stdio.h>
int main()
{
int i,n,x;
printf("Enter a positive number to check prime");
scanf("%d",&n);
x = sqrt(n);
for(i=2;i<=x;i++)
{
if(n%i==0)
break;
}
if(n>1 && i == x+1)
printf(“This is a prime number”);
else
printf(“This isn’t a prime number”);
}