Write a program in C to detennine whether a number a is prime or not [Board Question Solve]

        #include <stdio.h>

        #include <conio.h>

        

        main()

        {

        int n, i, flag=0;

        printf("Enter a positive number : ");

        scanf("%d",&n);

        for(i=2;i<=n/2;++i)

        {

        if(n%i==0)

        {

        flag=1;

        break;

        }

        }

        if (flag==0)

        printf("%d is a prime number.",n);

        else

        printf("%d is not a prime number.",n);

        getch();

        }