Java Program - Sum of Prime Numbers in a Range

Mathematics for Programming Numbers (Article) Numbers (Program)

21

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Given Input:

Expected Output:

Program:

public class SumOfPrimes {
    public static void main(String[] args) {
        int start = 10, end = 50;
        int sum = 0;

        for (int i = start; i <= end; i++) {
            if (isPrime(i))
                sum += i;
        }
        System.out.println("Sum of prime numbers between " + start + " and " + end + " is: " + sum);
    }

    public static boolean isPrime(int number) {
        if (number <= 1)
            return false;
        for (int i = 2; i <= number / 2; i++) {
            if (number % i == 0)
                return false;
        }
        return true;
    }
}

Output:

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