PHP Program to Check Even Number

Posted in PHP Tutorial

Updated on Jan 11, 2024

By Mari Selvan

👁️ 151 - 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 PHP 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 PHP code that accomplishes this task.

isEven.php

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<?php
// Function to check if a number is even
function isEven($number)
{
  // If the remainder is zero, the number is even
  return $number % 2 === 0;
}

// Driver program
// Replace this value with the number you want to check
$number = 10;

// Call the function to check if the number is even
if (isEven($number))
{
  echo "$number is an even number.\n";
}
else
{
  echo "$number is not an even number.\n";
}

?>

💻 Testing the Program

To test the program with different numbers, modify the value of $number in the code.

Output

10 is an even number.

🧠 How the Program Works

The program defines a function isEven that takes a number as input and returns true if the number is even, and false otherwise.
Replace the value of $number in the main program with the desired number you want to check.
The program calls the isEven function and prints the result using echo.

📏 Between the Given Range

Let's take a look at the PHP code that checks for even numbers in the specified range.

isEven.php

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<?php
// Function to check if a number is even
function isEven($number)
{
  return ($number % 2 == 0);
}

// Display even numbers in the range 1 to 10
echo "Even numbers in the range 1 to 10: \n";
for ($i = 1;$i <= 10;$i++)
{
  if (isEven($i))
  {
    echo $i . " ";
  }
}

?>

💻 Testing the Program

To test the program, simply run the script. The output will be the even numbers in the range 1 to 10, displayed as follows:

Output

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

🧠 How the Program Works

The isEven function returns true if the given number is even and false otherwise.
The loop iterates through numbers from 1 to 10, checking if each number is even and displaying it accordingly.