Program to find if a given number is prime or not.

C Program to find if a given number is prime or not.

#include <stdio.h>
int main()
{
int n, i, check=0;
printf("Enter a positive integer: ");
scanf("%d",&n);
for(i=2;i<=n/2;++i)
{
      if(n%i==0)
      {
          check=1;
          break;
      }
}
if (check==0)
      printf("%d is a prime number.",n);
else
      printf("%d is not a prime number.",n);
getch();
return 0;
}

Output:

Comments

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