====== FOR ... NEXT ======

Syntax:

	for <byte or int variable> = <byte or int initial_value> to <byte or int end_value> [step <byte or int step>]
	[statements...]
	next [<variable>]
	
The ''FOR ... NEXT'' construct will assign the result of ''initial_value'' to the given variable, then iterate the variable until it reaches the value of  ''end_value'', executing the commands between ''FOR'' and ''NEXT''  as many times as necessary. 

If ''step'' is provided, the variable will be incremented or decremented with ''step''. ''step'' defaults to 1 otherwise.

The types of ''initial_value'', ''end_value'' and ''step'' must match that of  ''variable''.

''FOR ... NEXT'' constructs can be nested.

**Note #1**: ''end_value'' is evaluated only once, before starting the loop.

**Note #2**: the variable name after the ''NEXT'' statement is not mandatory since version 2.3.

**Note #3**: the runtime library will not check the consistency of your ''FOR ... NEXT'' blocks. If there is a ''NEXT'' without ''FOR'', for example, the program will likely break.