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Purpose
Executes a group of subcommands while a conditional expression is TRUE or until a conditional expression evaluates to TRUE.
Syntax
Do While Condition Commands...Loop
Do Until Condition Commands...Loop
Do Commands...Loop While Condition
Do Commands...Loop Until Condition
When a loop reaches its last subcommand, the conditions (Condition) of the loop are re-evaluated. The loop then either iterates or processing continues at the first line after the loop. There are four types of Do...Loops (Do While...Loop, Do Until...Loop, Do...Loop While, Do...Loop Until). Each serves a different purpose. The main difference between the two While and Until loops is in the location of the condition.
Do...Loop...Condition commands always execute the subcommands at least once, even if the condition indicates that the loop should not iterate. Do While/Until Condition...Loop commands only execute the subcommands if the condition indicates that the loop should iterate. Loops using While iterate while the condition is TRUE. Loops using Until iterate until the condition evaluates to TRUE.
Example
Do While Score < 10
Print Score
Loop
Do
Print Score
Loop Until Score > 10
Both loops accomplish the same result.
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