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 in java

public class GCD {

    public static void main(String[] args) {

        int n1 = 81, n2 = 153, gcd = 1;

        for(int i = 1; i <= n1 && i <= n2; ++i)
        {
            // Checks if i is factor of both integers
            if(n1 % i==0 && n2 % i==0)
                gcd = i;
        }

        System.out.printf("G.C.D of %d and %d is %d", n1, n2, gcd);
    }
}

Example 3: 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();
   }
}