How Can I Determine if a Number is Even or Odd in PHP?

Determining Even versus Odd Numbers:

Determining whether a given number is odd or even in PHP is a fundamental task. The most straightforward approach involves utilizing the modulo operator (%).

Modulus Operator Approach:

The modulo operator, represented by %, calculates the remainder after dividing one number by another. When a number is divided by 2, an even number will yield a remainder of 0, while an odd number will have a remainder of 1.

Therefore, the following expression checks if a variable $number is even or odd:

$number % 2 == 0

• If the expression evaluates to true, $number is even.
• If it returns false, $number is odd.

Example:

$number = 20;
if ($number % 2 == 0) {
  echo "It's even";
} else {
  echo "It's odd";
}

Output:

It's even

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