isEvenNumber

isEvenNumber is a boolean function that determines if a given integer is an even number. An even number is an integer that is exactly divisible by 2, meaning there is no remainder when divided by 2. The function typically takes one argument, an integer, and returns true if the integer is even and false if it is odd.

The core logic of the isEvenNumber function relies on the modulo operator. The modulo operator (often represented by the '%' symbol in programming languages) calculates the remainder of a division. Therefore, if a number `n` modulo 2 (`n % 2`) results in 0, it signifies that `n` is perfectly divisible by 2, and thus is an even number.

For example, if the input is 4, 4 % 2 equals 0, so isEvenNumber(4) would return true. If the input is 7, 7 % 2 equals 1, so isEvenNumber(7) would return false. This function is fundamental in various programming tasks, including data validation, algorithms that require distinguishing between even and odd values, and in mathematical computations. Its simplicity and direct application make it a common utility in software development.