PHP · Theory

If else

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Theory

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If else

If else is simple if you keep it on paper. Asha uses it for If else on Asha's board in a viva board.

Keep If else small. Asha should finish If else on Asha's board in a few lines, not a 40-line dump.

Without If else, a viva board gets messy and If else on Asha's board is hard to trust.

Use If else when If else on Asha's board must stay clear. If a simpler PHP step works, use that instead.

If else trap — only reciting the name of If else. Asha loses marks for that every viva.

Place If else next to nearby PHP work — one If else step Asha can write from memory is the link.

Viva for If else: what it is → one If else step Asha can write from memory → the mistake (only reciting the name of If else).

Exam tip

Board: If else on Asha's board. Dry-run If else. Name the trap: only reciting the name of If else.

Example

<?php
// If else
$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";
}

If else: scores array, print avg, then high marks. Say the output.

Short notes

DefIf else — Asha uses it for If else on Asha's board in a viva board.
RuleIf else → one If else step Asha can write from memory.
RememberIf else + the PHP runtime (a viva board).
UseIf else in a viva board (If else on Asha's board).
TrapIf else — only reciting the name of If else.
ExIf else → If else on Asha's board.

PHP · Theory

If else

← All stacks

Theory

17/352

If else

If else is simple if you keep it on paper. Asha uses it for If else on Asha's board in a viva board.

Keep If else small. Asha should finish If else on Asha's board in a few lines, not a 40-line dump.

Without If else, a viva board gets messy and If else on Asha's board is hard to trust.

Use If else when If else on Asha's board must stay clear. If a simpler PHP step works, use that instead.

If else trap — only reciting the name of If else. Asha loses marks for that every viva.

Place If else next to nearby PHP work — one If else step Asha can write from memory is the link.

Viva for If else: what it is → one If else step Asha can write from memory → the mistake (only reciting the name of If else).

Exam tip

Board: If else on Asha's board. Dry-run If else. Name the trap: only reciting the name of If else.

Example

<?php
// If else
$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";
}

If else: scores array, print avg, then high marks. Say the output.

Short notes

DefIf else — Asha uses it for If else on Asha's board in a viva board.
RuleIf else → one If else step Asha can write from memory.
RememberIf else + the PHP runtime (a viva board).
UseIf else in a viva board (If else on Asha's board).
TrapIf else — only reciting the name of If else.
ExIf else → If else on Asha's board.

If else

Example

Short notes

Questions

If else

Example

Short notes

Questions