|
|
|
|
while Iteration command |
Usage |
while (<condition>) <command> |
Description |
| Executes <command> while the <condition> evaluates
to true (non zero result). <command> may be either a single command or a block of commands. It can contain the break command: in that case the execution of the <command> will be immediately interrupted and the control transferred to the command following this while block. It is valid for <command> to be an empty command terminated with a ;. <condition> is an expression as the ones evaluated by $(*) with the following extensions: If <condition> is a string, its length is evaluated: in this way a non-empty string causes the <condition> to be true, an empty string causes it to be false. If <condition> is an array, its size is evaluated: in this way a non-empty array causes the <condition> to be true, an empty array causes it to be false. If <condition> is a hash, the number of its entries is evaluated: in this way a non-empty hash causes the <condition> to be true, an empty hash causes it to be false. |
Examples |
%i = 0; while(%i < 100)%i++ while(%i > 0) { %i -= 10 if(%i < 20)break; } echo %i |