DO...LOOP

Syntax

[DO] WHILE condition
[statement block]
LOOP

DO
[statement block]
[LOOP] UNTIL condition

DO
[statement block]
LOOP

Description

Repeats a block of statements until/while the condition is met. The three above syntaxes show the different types. The DO .. LOOP without a WHILE or UNTIL will loop forever, unless an EXIT statement is executed.

An EXIT is the proper way to leave a DO...LOOP, you can also use a GOTO or RETURN statement.

Example

'This will continue to print "hello" on the screen until the condition (a > 10) is met.

a = 1
DO
PRINT "hello"
a += 1
LOOP UNTIL a > 10

Differences from other BASICs

Some BASICs allow interchangeability of UNTIL as the equivalent of NOT WHILE