Math Functions — PHP Technical Interview Questions & Answers

Math Functions

Math Functions

  • Math Functions is a PHP topic. In plain words you use it for function add($a, $b) in a marks helper. Don’t start with a slogan — start with that picture.
  • Smallest example: function name($x) { return $x; }. Type it, run it, and say what you see. If you can do that from memory, you know Math Functions.
  • From the example next to this theory: Math Functions — typed params and return types make PHP APIs clearer.
  • Trap: no return so the caller gets null. Fix that before you talk about advanced PHP.
  • Viva: what is Math Functions? Then show function name($x) { return $x; }. Then name the trap.

Technical Interview Tip: What is Math Functions? Show this: function name($x) { return $x; }. Trap: no return so the caller gets null.

Code Examples for Math Functions

Math Functions — working example

<?php
function greet(string $name, int $n = 1): string {
  return str_repeat("Hi $name! ", $n);
}
echo greet("Asha");
echo greet("Dev", 2);

Math Functions — typed params and return types make PHP APIs clearer.

How to Explain Math Functions to an Interviewer

What is Math Functions?

Used for function add($a, $b) a marks helper Not just the heading

Give one small example of Math Functions.

function name($x) { return $x; } Math Functions — typed params and return types make PHP APIs clearer

What mistake do beginners make with Math Functions?

no return so the caller gets null Show the fix

Where do you use Math Functions?

a marks helper function add($a, $b)