Java Program to Check Whether a Number is Even or Odd

September 27, 2022

Check Whether a number is Even or Odd using Java

Given an integer input num, the objective is to write a code to Check Whether a Number is Even or Odd in Java Language. To do so we check if the number is divisible by 2 or not, it’s Even if it’s divisible otherwise Odd.

Example 
Input : num = 11
Output : Odd

Check Whether a Number is Even or Odd in Java

Given an integer input the objective is to write a Java code to Check Whether a Number is Even or Odd. To do so the main idea is to divide the number by 2 and check if it’s divisible or not. It’s an Even number is it’s perfectly divisible by 2 or an Odd number otherwise.

Here are the Methods to solve the above mentioned problem,

Method 1 : Using Brute Force
Method 2 : Using Ternary Operator
Method 3 : Using Bitwise Operators

We’ll discuss the above mentioned methods in detail in the next section.

Sum of First N Natural numbers

Sum of N natural numbers

Sum of numbers in a given range

Greatest of two numbers

Greatest of the Three numbers

Method 1 : Using Brute Force

This method simply checks if the given input integer is divisible by 2 or not. If it’s divisible then print Even or Odd otherwise.

Algorithm

The working of the above code is mentioned below

Input an integer input “number“
Check whether the number is divisible by 2
This means using modulo/remainder operator leaves 0 as a remainder
Do : if (number % 2 == 0)
1. if yes, print “Even number”
2. if not, print “Odd number”

Java Code

Run


public class Main
 {
      public static void main(String[] args) {
           int number = 29;


     //checking whether the number is even or odd
     if (number % 2 == 0)
              System.out.println(number + " is Even");
     else
              System.out.println(number + " is odd");
      }
 }

Output

29 is Odd

Method 2 : Using Ternary Operator

This Method uses the ternary operator to check if the integer input is divisible by 2, If true print Even or Odd otherwise.

Ternary Operator Syntax ( Condition ) ? ( if True : Action ) : ( if False : Action ) ;

Algorithm

The working of the above code is as follows,

Input an integer input “number“
Check whether the number is divisible by 2 using the ternary operator
(number % 2) ? (cout <<“Even”) : (cout << “Odd”)

Java Code

Run

 public class Main
 {
   public static void main (String[]args)
   {
     int number = 29;

     //Checking if the number is divisible by 2
     String status = number % 2 == 0 ? " is Even" : " is Odd";
       System.out.println (number + status);
   }
 }

Output

 29 is Odd

Method 3 : Using Bitwise Operator

This Method uses bitwise operators to check if a given number is Even or Odd.

Bitwise Operators In computer programming, a bitwise operation operates on a bit string, a bit array or a binary numeral at the level of its individual bits. It is a fast and simple action, basic to the higher-level arithmetic operations and directly supported by the processor

Algorithm

The working of the above code is as follows,

If we have any number ‘n‘ doing bitwise ‘&‘ operation will give resultant as
- 1: If n is odd
- 0: if n is even

Java Code

Run

public class Main
{
  public static void main (String[]args)
  {
    int number = 29;

    if (isEven (number))
        System.out.println ("Even");
    else
        System.out.println ("Odd");
  }


// Returns true if n is even, else odd
  static bool isEven (int number)
  {

    // n & 1 is 1, then odd, else even
    return (!(number & 1));
  }
}

Output

Odd

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ASCII Table
Positive or Negative number: C | C++ | Java | Python
Even or Odd number: C | C++ | Java | Python
Sum of First N Natural numbers: C | C++ | Java | Python
Sum of N natural numbers: C | C++ | Java | Python
Sum of numbers in a given range: C | C++ | Java | Python
Greatest of two numbers: C | C++ | Java | Python
Greatest of the Three numbers: C | C++ | Java | Python
Leap year or not: C | C++ | Java | Python
Prime number: C | C++ | Java | Python
Prime number within a given range: C | C++ | Java | Python
Sum of digits of a number: C | C++ | Java | Python
Reverse of a number : C | C++ | Java | Python
Palindrome number: C | C++ | Java | Python
Armstrong number : C | C++ | Java | Python
Armstrong number in a given range : C | C++ | Java | Python
Fibonacci Series upto nth term : C | C++ | Java | Python
Find the Nth Term of the Fibonacci Series : C | C++ | Java | Python
Factorial of a number : C | C++ | Java | Python
Power of a number : C | C++ | Java | Python
Factor of a number : C | C++ | Java | Python
Finding Prime Factors of a number : C | C++ | Java | Python
Strong number : C | C++ | Java | Python
Perfect number : C | C++ | Java | Python
Automorphic number : C | C++ | Java | Python
Harshad number : C | C++ | Java | Python
Abundant number : C| C++ | Java | Python
Friendly pair : C | C++ | Java | Python