An improved FOR NEXT loop

[zaadstra]

I'm probably missing the point here ;-)  FOR NEXT is perfectly working fine if you know the rules.

I want to add my 'special' that I'm using sometimes in FOR NEXT.

Code: QB64: [Select]

1. FOR i=1 TO 10
2.  ' code
3.    IF condition = TRUE then i=11 ' cleanly jump out of loop at end
4.  ' even more code
5. NEXT

[TempodiBasic]

@bartok
about

the DO-LOOP cycle, not only often exites with EXIT DO without reaching the condition of LOOP UNTIL, LOOP WHILE, DO UNTIL, DO WHILE, but it can also loops only a part of itself. FOR-NEXT, it is very powerfull to make arrays for math purposes.

you can  evaluate this new opportunity that is of QB64 and not of Qbasic
http://qb64.org/wiki/CONTINUE together  this one http://qb64.org/wiki/EXIT


@zaadstra
about exiting from FOR loop
your tip is good in QB45, but your code becomes this following one in QB64

Code: QB64: [Select]

1. FOR i=1 TO 10
2.  ' code
3.  ' even more code
4.   IF condition = TRUE then EXIT  FOR   'i=11 ' cleanly jump out of loop at end
5.  NEXT

[bartok]

@bartok
about you can  evaluate this new opportunity that is of QB64 and not of Qbasic
http://qb64.org/wiki/CONTINUE together  this one http://qb64.org/wiki/EXIT

Very interesting. I have to try, but I think it can remove the necessity of DO-LOOPs nested in pairs. Thank's.

[bartok]

No, nothing changes in my case: DO-LOOPs nested in pairs must stay in place, because, generally, when some definite variables become TRUE in the second level, the DO-LOOP exites with EXIT DO, and the program goes to the DO-LOOP of first level, but here not necessary the program must loop the pair: here an other control of the variables determines if the program has to loop the pair, or exit and go to the second level of an other pair of DO-LOOP, and so on until the program ends or the user want to close it. _CONTINUE doesn't allow the described check of variables, but it is a useful command.