Write a program that figures if a number is prime and what tests would you perform on it.

Question

Sigiloso · Accepted Answer

public void testPrime () {
		int num = -1;
		if (num == 1 || num == 2 ) {
			System.out.println("The number is prime : " + num );
		}
		int flag = 0;
		
		for (int i = 2 ; i < num ; i++) {
			if (num < 0) {
				System.out.println("Prime numbers are not positive");
				break;
			}
			if (num%2 == 0) {
				flag = 1;
				break;
			}
		}
		if (flag == 0) {
			System.out.println("The number is prime : " + num );
		} else  {
			System.out.println("The number is not prime : " + num );
		}
	}

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