Java Program to Find Product of Even and Odd Digits of a Number

In the previous article, we have seen Java Program to Find Sum of Even and Odd Digits of a Number

In this article we will see how we can find product of all even and odd digits of a number using Java programming language.

Java Program to Find Product of Even and Odd Digits of a Number

We have to find product of even and odd digits of a number. Means we have to check each number it is even or odd. If it is odd then multiply it with odd digits and if it is even then multiply it with even digits and finally show the product of odd and product of even digits separately.

For example:

If a number is 67843

Then in this number even digits are 6, 8 and 4. So, product of even digits are 6*8*4=192

Odd digits are 7 and 3. So, product of odd digits are 7*3=21

Let’s see different ways to find product of all even and odd digits of a number.

By Using Static Input Value
By Using User Input Value
By Using User Defined Method

Method-1: Java Program to Find Product of Even and Odd Digits of a Number By Using Static Input Value

Approach:

Declare an integer variable ‘number‘ and initialize the value.
Declare two integer variables evenSum and oddSum and initialize both to 1.
Using a while loop check each digit the number.
If digit is even then multiply it to evenProduct
else multiply it to oddProduct
Print the result.

Program:

public class Main 
{
   public static void main(String args[])
   {
      //an integr variable 'number' declared and initialized
      int number = 6547;
   
       //declaring two variables evenProduct and oddProduct 
       //and initializing both to 1
       int evenProduct=1;
       int oddProduct=1;
       
      //continue loop till number becomes 0
      while(number!=0)
        {
            //getting digit of number
            int rem=number%10;
            
            //if 'rem' is even digit then multiply it to evenProduct
            if(rem%2==0)
            {
                evenProduct=evenProduct*rem;
            }
            //else multiply it to oddProduct
            else
            {
                oddProduct=oddProduct*rem;
            }
            
            number=number/10;
        }
      System.out.println("Product of even digits: "+ evenProduct);
      System.out.println("Product of odd digits: "+ oddProduct);
   }
}

Output:

Product of even digits: 10
Product of odd digits: 12

Method-2: Java Program to Find Product of Even and Odd Digits of a Number By Using User Input Value

Approach:

Declare an integer variable ‘number‘ and take the value as user input using Scanner class.
Declare two integer variables evenProduct and oddProduct and initialize both to 1.
Using a while loop check each digit the number.
If digit is even then multiply it to evenProduct
else multiply it to oddProduct
Print the result.

Program:

import java.util.*;

public class Main 
{
   public static void main(String args[])
   {
      Scanner sc=new Scanner(System.in);
      
      //taking a number input from user
      System.out.println("Enter a number: ");
      int number = sc.nextInt();
   
       //declaring two variables evenProduct and oddProduct
       //and initializing both to 1
       int evenProduct=1;
       int oddProduct=1;
       
      //continue loop till number becomes 0
      while(number!=0)
        {
            //getting digit of number
            int rem=number%10;
            
            //if 'rem' is even digit then multiply it to evenProduct
            if(rem%2==0)
            {
                evenProduct=evenProduct*rem;
            }
            //else multiply it to oddProduct
            else
            {
                oddProduct=oddProduct*rem;
            }
            
            number=number/10;
        }
      System.out.println("Product of even digits: "+ evenProduct);
      System.out.println("Product of odd digits: "+ oddProduct);
   }
}

Output:

Enter a number: 
88325
Sum of even digits: 18
Sum of odd digits: 8

Method-3: Java Program to Find Sum of Even and Odd Digits of a Number By Using User Defined Method

Approach:

Declare an integer variable ‘number‘ and initialize the value.
Call a user defined method evenOdd() and pass that number as parameter.
Inside method declare two integer variables evenProduct and oddProduct and initialize both to 1.
Using a while loop check each digit the number.
If digit is even then multiply it to evenProduct
else multiply it to oddProduct
Print the result.

Program:

import java.util.*;

public class Main 
{
   public static void main(String args[])
   {
      Scanner sc=new Scanner(System.in);
      
      //taking a number input from user
      System.out.println("Enter a number: ");
      int number = sc.nextInt();
      //calling user defined method evenOdd()
      evenOdd(number);
   }
   
   //evenOdd() method to find sum of even and odd digits  
   public static void evenOdd(int number)
   {
       //declaring two variables evenProduct and oddProduct 
       //and initializing both to 1
       int evenProduct=1;
       int oddProduct=1;
       
      //continue loop till number becomes 0
      while(number!=0)
        {
            //getting digit of number
            int rem=number%10;
            
            //if 'rem' is even digit then multiply it to evenProduct
            if(rem%2==0)
            {
                evenProduct=evenProduct*rem;
            }
            //else multiply it to oddProduct
            else
            {
                oddProduct=oddProduct*rem;
            }
            
            number=number/10;
        }
      System.out.println("Sum of even digits: "+ evenProduct);
      System.out.println("Sum of odd digits: "+ oddProduct);
   }
}

Output:

Enter a number: 
4365
Sum of even digits: 10
Sum of odd digits: 8

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