Crestron simpl plus language ref 사용자 설명서

Crestron SIMPL+

®

Software 

z 83

FOR

FOR (<variable> = <start_expression> TO <end_expression>

[STEP <step_expression>]) 

[{]

<statements>

[}]

This loop executes the <statements> while <variable> iterates from the value of 
<start_expression> to the value of <end_expression>. The variable is incremented by 
<step_expression> at the end of the loop, if STEP is specified, else it is incremented 
by 1. The <step_expression> can be negative which will result in the loop counting 
down. If only one statement is present in the body of the loop, then the { and } 
characters are not required, but may be used. If more than one statement is present in 
the loop body, then the { and } characters are mandatory. Note that 
<start_expression> and <end_expression> are evaluated once before the loop starts 
and are not re-evaluated during the execution of the loop. If it is defined, 
<step_expression> is evaluated each pass through the loop, so <step_expression> 
may be modified during execution of the loop.

In the 2-Series control systems, the <step_expression> cannot change its sign during 
the execution of the loop. That is, if it is initially a positive number, then it is assumed 
if it will always count up. If it is negative, it will always count down.

At the end of the loop, the loop index has the value of <end_expression> + 1 (unless 
the loop index was modified in the body of the loop).

The comparisons are based on signed numbers, the maximum loop size for a step of 
one would be from 1 to 32767. If larger indices are needed, for example, from 1 to 
60000 a DO-UNTIL or WHILE loop could be used.

NOTE: If <variable> is set to a value greater than the <end_expression> within the 
body of the FOR loop, the FOR loop will exit when it reaches the end.