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WHILE Statement

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WHILE Statement

WHILE statements provide a means of repeating blocks of code a variable number of times, depending on the conditions that the blocks are run under.

Syntax

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WHILE condition_A
do_A

Nomenclature

condition_A Some logic expression that can be evaluated to give a boolean result.
do_A The code to execute while condition_A is true. In most cases, do_A will change condition_A at some point to make it false, breaking the loop.

Example

The following example sums each of the integers between 0 and 9.

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$counter = 0;
WHILE $counter < 9
BEGIN
  $sum = $sum + counter;
  $counter = $counter + 1;
END