printf() — PHP Technical Interview Questions & Answers

printf()

printf()

  • printf() is a PHP topic. In plain words you use it for Hello, Asha in a web page. Don’t start with a slogan — start with that picture.
  • Smallest example: echo / print. Type it, run it, and say what you see. If you can do that from memory, you know printf().
  • From the example next to this theory: printf(): scores array, print avg, then high marks.
  • Trap: missing semicolon. Fix that before you talk about advanced PHP.
  • Viva: what is printf()? Then show echo / print. Then name the trap.

Technical Interview Tip: What is printf()? Show this: echo / print. Trap: missing semicolon.

Code Examples for printf()

printf() — working example

<?php
// printf()
$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";
}

printf(): scores array, print avg, then high marks. Say the output.

How to Explain printf() to an Interviewer

What is printf()?

Used for Hello, Asha a web page Not just the heading

Give one small example of printf().

echo / print printf(): scores array, print avg, then high marks

What mistake do beginners make with printf()?

missing semicolon Show the fix

Where do you use printf()?

a web page Hello, Asha