PHP · Theory

pi()

Theory

315/352

pi()

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

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

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

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

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

Exam tip

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

Example

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

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

Short notes

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

PHP · Theory

pi()

← All stacks

Theory

315/352

pi()

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

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

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

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

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

Exam tip

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

Example

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

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

Short notes

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

pi()

Example

Short notes

Questions

pi()

Example

Short notes

Questions