how to find gcd of two numbers in java code example

Example 1: Find GCD of three numbers in java

// Find GCD of three numbers in java
import java.util.Scanner;
public class GCDOfThreeNumbers 
{
   public static void main(String[] args) 
   {
      Scanner sc = new Scanner(System.in);
      System.out.println("Please enter first number: ");
      int number1 = sc.nextInt();
      System.out.println("Please enter second number: ");
      int number2 = sc.nextInt();
      System.out.println("Please enter third number: ");
      int number3 = sc.nextInt();
      int gcdNumbers = GCDOfThreeNumbers.findGCD(number1, number2, number3);
      System.out.println("GCD of three numbers " + number1 + ", " + number2 + " and " + number3 + " is: " + gcdNumbers);
      sc.close();
   }
   public static int findGCD(int x, int y) 
   {
      if(y == 0)
      {
         return x;
      }
      else
      {
         return findGCD(y, x % y);
      }
   }
   public static int findGCD(int x, int y, int z) 
   {
      return findGCD(findGCD(x, y), z);
   }
}

Example 2: gcd of two numbers in java

// gcd of two numbers in java
import java.util.Scanner;
public class GCDOfTwoNumbers 
{
   public static void main(String[] args) 
   {
      int a, b;
      Scanner sc = new Scanner(System.in);
      System.out.print("Please enter first number: ");
      a = sc.nextInt();
      System.out.print("Please enter second number: ");
      b = sc.nextInt();
      while(a != b) 
      {
         if(a > b)
         {
            a = a - b;
         }
         else
         {
            b = b - a;
         }
      }
      System.out.println("GCD of two numbers in java: " + b);
      sc.close();
   }
}