C# Program to Check Even Number

Posted in C# Tutorial

Updated on Jan 11, 2024

By Mari Selvan

👁️ 389 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

🙋 Introduction

In the realm of programming, dealing with numbers is a fundamental task. One common requirement is checking whether a given number is even or not. An even number is an integer that is exactly divisible by 2 without leaving a remainder.

In this tutorial, we will explore a C# program designed to check whether a given number is even. The program involves using the modulo operator to determine if the number is divisible by 2.

📄 Example

Let's delve into the C# code that accomplishes this task.

EvenNumberChecker.cs

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using System;

class EvenNumberChecker {
  // Function to check if a number is even
  static bool IsEven(int number) {
    // If the remainder is zero, the number is even
    return number % 2 == 0;
  }

  // Driver program
  static void Main() {
    // Replace this value with the number you want to check
    int number = 10;

    // Call the function to check if the number is even
    if (IsEven(number))
      Console.WriteLine($"{number} is an even number.");
    else
      Console.WriteLine($"{number} is not an even number.");
  }
}

💻 Testing the Program

To test the program with different numbers, modify the value of number in the Main method.

Output

10 is an even number.

🧠 How the Program Works

The program defines a class EvenNumberChecker containing a static method IsEven that takes an integer number as input and returns true if the number is even, and false otherwise.
Inside the Main method, replace the value of number with the desired number you want to check.
The program calls the IsEven method and prints the result using Console.WriteLine.

📏 Between the Given Range

Let's take a look at the C# code that checks for even numbers in the range 1 to 10.

Program.cs

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using System;

class Program {
  static void Main() {
    // Define the range
    int start = 1;
    int end = 10;

    Console.Write("Even numbers in the range 1 to 10: \n");

    // Check and print even numbers in the range
    for (int i = start; i <= end; i++) {
      if (IsEven(i)) {
        Console.Write(i + " ");
      }
    }

    Console.WriteLine();
  }

  // Function to check if a number is even
  static bool IsEven(int number) {
    return number % 2 == 0;
  }
}

💻 Testing the Program

Output

Even numbers in the range 1 to 10:
2 4 6 8 10

Compile and run the program to see the even numbers in the range 1 to 10.

🧠 How the Program Works

The program defines a function IsEven that takes an integer as input and returns true if the number is even, and false otherwise.
In the Main method, it specifies the range from 1 to 10 and checks each number in the range using the IsEven function.
Even numbers are printed in the specified format.