PHP · Theory

sqrt()

Theory

312/352

sqrt()

sqrt() is a PHP topic. In plain words you use it for a short sqrt example in a college portal page. Don’t start with a slogan — start with that picture.

Smallest example: the smallest sqrt example you can type. Type it, run it, and say what you see. If you can do that from memory, you know sqrt().

From the example next to this theory — sqrt(): scores array, print avg, then high marks.

Trap — only saying “sqrt” with no example. Fix that before you talk about advanced PHP.

Viva — what is sqrt()? Then show the smallest sqrt example you can type. Then name the trap.

Exam tip

What is sqrt()? Show this: the smallest sqrt example you can type. Trap: only saying “sqrt” with no example.

Example

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

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

Short notes

Defsqrt() — a short sqrt example in a college portal page.
Rulethe smallest sqrt example you can type
Traponly saying “sqrt” with no example
Usea college portal page

PHP · Theory

sqrt()

← All stacks

Theory

312/352

sqrt()

sqrt() is a PHP topic. In plain words you use it for a short sqrt example in a college portal page. Don’t start with a slogan — start with that picture.

Smallest example: the smallest sqrt example you can type. Type it, run it, and say what you see. If you can do that from memory, you know sqrt().

From the example next to this theory — sqrt(): scores array, print avg, then high marks.

Trap — only saying “sqrt” with no example. Fix that before you talk about advanced PHP.

Viva — what is sqrt()? Then show the smallest sqrt example you can type. Then name the trap.

Exam tip

What is sqrt()? Show this: the smallest sqrt example you can type. Trap: only saying “sqrt” with no example.

Example

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

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

Short notes

Defsqrt() — a short sqrt example in a college portal page.
Rulethe smallest sqrt example you can type
Traponly saying “sqrt” with no example
Usea college portal page

sqrt()

Example

Short notes

Questions

sqrt()

Example

Short notes

Questions