While Loop — PHP Technical Interview Questions & Answers

While Loop

While Loop

  • While Loop is a PHP topic. In plain words you use it for pass if marks >= 40 in result.php. Don’t start with a slogan — start with that picture.
  • Smallest example: if / foreach ($arr as $row). Type it, run it, and say what you see. If you can do that from memory, you know While Loop.
  • From the example next to this theory: While Loop: scores array, print avg, then high marks.
  • Trap: foreach by reference then reuse the variable. Fix that before you talk about advanced PHP.
  • Viva: what is While Loop? Then show if / foreach ($arr as $row). Then name the trap.

Technical Interview Tip: What is While Loop? Show this: if / foreach ($arr as $row). Trap: foreach by reference then reuse the variable.

Code Examples for While Loop

While Loop — working example

<?php
// While Loop
$scores = [80, 90, 70];
$avg = array_sum($scores) / count($scores);
echo "avg=" . number_format($avg, 1) . "\n";
foreach ($scores as $s) {
  if ($s >= 80) echo "high: $s\n";
}

While Loop: scores array, print avg, then high marks. Say the output.

How to Explain While Loop to an Interviewer

What is While Loop?

Used for pass if marks >= 40 result.php Not just the heading

Give one small example of While Loop.

if / foreach ($arr as $row) While Loop: scores array, print avg, then high marks

What mistake do beginners make with While Loop?

foreach by reference then reuse the variable Show the fix

Where do you use While Loop?

result.php pass if marks >= 40