What are the potential pitfalls of using the modulo operator in PHP for checking even/odd variables?

Using the modulo operator for checking even/odd variables in PHP can lead to potential pitfalls when dealing with negative numbers. This is because the modulo operator returns the remainder after division, which can be negative if the dividend is negative. To solve this issue, we can use the bitwise AND operator (&) instead, which is more reliable for checking even/odd numbers in PHP. 

function isEven($num) {
    return ($num & 1) == 0;
}

function isOdd($num) {
    return ($num & 1) == 1;
}

Keywords

modulo operator even/odd variables integer division floating point arithmetic precision errors

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