Number can be categorized into two groups: **even** or **odd**. It is an even number if the number is evenly divisible by 2. It is an odd number if the number is not evenly divisible by 2.

In this tutorial, we’ll show you some examples of how to check and identify the even or odd number in Java.

**Note:**

**Even number**: A number is evenly divisible by 2.**Odd number**: A number is not evenly divisible by 2.

## What You’ll Need

- Oracle JDK 1.6 or above

## Example 1: Use Modulus Operator

In this example, we will use modulus operator `%`

to check the even or odd number.

```
int[] intArrays = {-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5};
for (int number: intArrays) {
if (number % 2 == 0) {
// This is even number
System.out.println(number + " is even number");
} else {
// This is odd number
System.out.println(number + " is odd number");
}
}
```

## Example 2: Use Bitwise AND Operator

In this example, we will use bitwise AND operator `&`

to check the even or odd number.

Bitwise AND operation rules:

- 0 & 0 = 0
- 0 & 1 = 0
- 1 & 0 = 0
- 1 & 1 = 1

```
int[] intArrays = {-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5};
for (int number: intArrays) {
if ((number & 1) == 0) {
// This is even number
System.out.println(number + " is even number");
} else {
// This is odd number
System.out.println(number + " is odd number");
}
}
```

## Java Code

`CheckEvenOddNumberExample.java`

```
package com.chankok.operators;
public class CheckEvenOddNumberExample {
public static void main(String[] args) {
// Initial the integer array
int[] intArrays = {-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5};
/*
* Example 1: Check even or odd number using modulus operator (%)
*/
System.out.println("Example 1: Use modulus operator");
for (int number: intArrays) {
if (number % 2 == 0) {
// This is even number
System.out.println(number + " is even number");
} else {
// This is odd number
System.out.println(number + " is odd number");
}
}
// Print new line
System.out.println();
/*
* Example 2: Check even or odd number using bitwise AND operator (&)
*/
System.out.println("Example 2: Use bitwise AND operator");
for (int number: intArrays) {
if ((number & 1) == 0) {
// This is even number
System.out.println(number + " is even number");
} else {
// This is odd number
System.out.println(number + " is odd number");
}
}
}
}
```

## Output

```
Example 1: Use modulus operator
-5 is odd number
-4 is even number
-3 is odd number
-2 is even number
-1 is odd number
0 is even number
1 is odd number
2 is even number
3 is odd number
4 is even number
5 is odd number
Example 2: Use bitwise AND operator
-5 is odd number
-4 is even number
-3 is odd number
-2 is even number
-1 is odd number
0 is even number
1 is odd number
2 is even number
3 is odd number
4 is even number
5 is odd number
```