Example: Add Two Fractions in Java

// Add Two Fractions
import java.util.Scanner;

// Main class containing the entry point of the program
public class Main {

    // Method to calculate the Greatest Common Divisor (GCD)
    // Used for simplifying fractions
    public static int gcd(int a, int b) {
        if (b == 0) {
            return a;
        }
        return gcd(b, a % b);
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // Step 1: Get input for the first fraction
        System.out.print("Enter numerator for fraction 1: ");
        int num1 = scanner.nextInt();
        System.out.print("Enter denominator for fraction 1: ");
        int den1 = scanner.nextInt();

        // Step 2: Get input for the second fraction
        System.out.print("Enter numerator for fraction 2: ");
        int num2 = scanner.nextInt();
        System.out.print("Enter denominator for fraction 2: ");
        int den2 = scanner.nextInt();

        // Step 3: Calculate the common denominator
        int commonDenominator = den1 * den2;

        // Step 4: Convert numerators to the common denominator
        int newNum1 = num1 * den2;
        int newNum2 = num2 * den1;

        // Step 5: Add the new numerators
        int sumNumerator = newNum1 + newNum2;

        // Step 6: Simplify the resulting fraction
        int commonDivisor = gcd(sumNumerator, commonDenominator);
        int simplifiedNumerator = sumNumerator / commonDivisor;
        int simplifiedDenominator = commonDenominator / commonDivisor;

        // Step 7: Display the result
        System.out.println("The sum of " + num1 + "/" + den1 + " and " + num2 + "/" + den2 + " is: " +
                           simplifiedNumerator + "/" + simplifiedDenominator);

        scanner.close();
    }
}