PowerD.html - for statement (FOR)

News:
- 0.20alpha5: added the C-like ability, see below
Description:
FOR is a loop, where its variable is after each loop increased/decreased by one, or by given <step> value. FOR is very basic loop, it can be easily simulated by WHILE or REPEAT loops. <step> value can be changed also inside the given loop, but pay attention about this. TO keyword means, that <exp> has at the beginning lower value then the <end>, else use DTO keyword. If you are not sure about it, use WHILE or REPEAT instead. You can also use floats.

Syntax:

  FOR <exp> ( TO / DTO ) <end> [ STEP <step> ]
    <statements>
  ENDFOR [ <list> ]

  FOR <exp> ( TO / DTO ) <end> [ STEP <step> ] DO <statements> [ IS <list> ]  // see DO keyword

  FOR <exp> ( TO / DTO ) <end> [ STEP <step> ] <statement> [ IS <list> ]

where <exp> must be something like: n, n:=2, n:=i*j, etc. It have to contain a variable, or a variable's assignation.

Returning values:
Watch <list> in syntax part. This allows You to return values with FOR statement like:
```
  a:=FOR...
```
Early exit:
See EXIT/EXITIF

C-like FOR ability

  FOR <exp> IF <condition> STEP <step>
    <statements>
  ENDFOR

This means, that <exp> is processed at the beginning and then, when the <condition> is TRUE, <statements> will process and at the end the <step> will process. Then the <condition> is taken again...