Difference between revisions of "Repeat..until"
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{{command header|Flow Control}} | {{command header|Flow Control}} | ||
| − | {{body|repeat { } until | + | {{body|repeat { } until ( expression )|The ''repeat..until'' control structure executes the code block between the statements, and then evaluates the expression. This will make it so that [[repeat..until]] loops will always execute the code within the loop at least once. This command differs from the [[while]] command because the expression is evaluated prior to the code inside the code block, where [[while]] evaluates the expression after executing it's code block.}} |
==== Example ==== | ==== Example ==== | ||
<pre> | <pre> | ||
set %str Hello , #spc , World | set %str Hello , #spc , World | ||
| − | repeat | + | repeat |
| + | { | ||
set %str %str , ! | set %str %str , ! | ||
| − | str len %str | + | str len %str |
| + | } | ||
until #strres >= 30 | until #strres >= 30 | ||
display ok %str | display ok %str | ||
Revision as of 18:59, 18 March 2006
Synopsis
repeat { } until ( expression )
Description
The repeat..until control structure executes the code block between the statements, and then evaluates the expression. This will make it so that repeat..until loops will always execute the code within the loop at least once. This command differs from the while command because the expression is evaluated prior to the code inside the code block, where while evaluates the expression after executing it's code block.
Example
set %str Hello , #spc , World
repeat
{
set %str %str , !
str len %str
}
until #strres >= 30
display ok %str
halt
The example above illustrates the difference between a repeat..until loop and a while loop. the exclamation point will always be concatinated to the end of the %str variable, and str len will be executed once before the test for #strRes >= 30 is first evaluated.
See also
| Main Page | Documentation |
