Question

who to c programing of prime number

Answer 1

#include <stdio.h>

int main()
{
    printf("Enter number : ");
    int n,c=0,i;
    scanf("%d",&n);
    
    for(i = 2; i<=n/2; i++)
    {
        if(n % i == 0)
        {
            c = 1;
            break;
        }
    }
    
    if(c==0)
        printf("%d is prime number",n);
    else
         printf("%d is not prime number",n);

    return 0;
}