# Java Program to Count Even and Odd Numbers in an Array

Program description:- Write a Java program to count the even and odd numbers in the given array. Use a method to perform this operation. Take the array, and count even-odd numbers, and display it.

Example1:-
Array = {11, 12, 13, 14, 15}
Count of the even number = 2
Count of the odd number = 3

Example2:-
Array = {-15, -10, -5, 0, 5, 10, 15}
Count of the Even numbers = 3
Count of the Odd numbers = 4

In this program, we will take input value for the array from the end-user, but you can take it explicitly. See:- how to take array input in Java. We will use a method to perform the operation. Let us see the program.

Procedure to develop a Java method to count the odd and even numbers in the given array,
a) Take an array
b) Take two variables to count the odd and even numbers and initialize it with the value 0. Assume they are oddCount, and evenCount
c) Traverse to the array
d) Check each element of the array whether it is even or not.
e) If it is an even number then increase the value of evenCount variable by 1.
f) Else it is an odd number and increases the value of oddCount variable by 1.
g) Display the resultant value of oddCount and evenCount variables.

## Count Even and Odd Numbers in an Array in Java

```import java.util.Scanner;

public class ArrayTest {

public static void main(String[] args) {
// create Scanner class object to take input
Scanner scan = new Scanner(System.in);

// read size of the array
System.out.print("Enter size of the array: ");
int n = scan.nextInt();

// create an int array of size n
int numbers[] = new int[n];

// take input for the array
System.out.println("Enter array elements: ");
for (int i = 0; i < n; ++i) {
numbers[i] = scan.nextInt();
}

// count odd-even
countOddEven(numbers);

// close Scanner
scan.close();

}

// method to count odd and even numbers
// in a given array and display it
public static void countOddEven(int[] arr) {

// variables
int oddCount = 0;
int evenCount = 0;

// traverse the array
for (int i = 0; i < arr.length; ++i) {
if (arr[i] % 2 == 0) // even
++evenCount;
else                 // odd
++oddCount;
}

// display result
System.out.println("Count of the Even numbers = "
+ evenCount);
System.out.println("Count of the Odd numbers = "
+ oddCount);

}

}```

Output:-

Enter the size of the array: 5
Enter array elements:
11 12 13 14 15
Count of the Even numbers = 2
Count of the Odd numbers = 3

Enter the size of the array: 7
Enter array elements:
-15 -10 -5 0 5 10 15
Count of the Even numbers = 3
Count of the Odd numbers = 4

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