WHAT IS WRONG WITH THIS SCRIPT?!?!

[Mango]

Could someone please tell me what i'm doin wrong here!!
I type the following script in and then get the message 'Block IF without END IF' and cant run my script

THE SCRIPT:

INPUT "choice", mainmenu%
IF mainmenu% = 1 THEN
GOTO 1
.
.
.
IF mainmenu% = 2 THEN
GOTO 6
ELSE
GOTO 7
END IF

PLEASE HELP!!!!!!!!!!

The following is how block if then is structured...note the ELSE IF...your original code had 7 nested block if then statements...you needed 7 END IF statements to make it work...

INPUT "choice", variable

IF variable = 1 THEN
do this stuff
ELSE IF variable = 2 THEN
do this stuff
ELSE
do this
END IF


read the manual is good advice...and look at other people's code...and experiment...

[whitetiger0990]

Code:

IF mainmenu% >= 1 THEN IF mainmenu% <= 6 THEN ON mainmenu% GOTO 1, 2, 3, 4, 5, 6

Dude... You saved me some room in the program i was working on! Thanx! :o

[Piptol]

Code:

IF mainmenu% >= 1 THEN IF mainmenu% <= 6 THEN ON mainmenu% GOTO 1, 2, 3, 4, 5, 6

Dude... You saved me some room in the program i was working on! Thanx! :o

You'll save even more room if you change that THEN IF to an AND

[seph]

I was thinking the same thing Piptol but before I could post that, I came across Rel's post from a long while ago:

Seph:

Slow:

Code:

if X=0 and Y=1 and Z=3 then
     End if

Faster: (They call this "Short Circuit"

Code:

If X=0 then
        if Y=1 then
             if Z=3 then
             End if
        End if
   End if

[Piptol]

Hmm, guess I should have known that from C++. For some reason though I didn't think it worked like that in QB. Oh well, I bow to rel's genius (on this occassion, at least)

[Agamemnus]

And it only takes a few lines of code to convert from a AND b to IF THEN b.

Pitiful.

[whitetiger0990]

so ut's faster to do it the Short Circuit way?

[Agamemnus]

As I remember someone else saying, QB first reads the WHOLE IF part of the statement then evaluates the WHOLE statement instead of reordering any parentheses and evaluating it incrementally.

[Phydaux]

Code:

IF mainmenu% >= 1 THEN IF mainmenu% <= 6 THEN ON mainmenu% GOTO 1, 2, 3, 4, 5, 6

Dude... You saved me some room in the program i was working on! Thanx! :o

You'll save even more room if you change that THEN IF to an AND

Code:

IF mainmenu% >= 1 AND mainmenu% <= 6 THEN ON mainmenu% GOTO 1, 2, 3, 4, 5, 6

Obviously didn't see my earlier post then :/

[whitetiger0990]

I am still confused. So if you use:

Code:

IF a = 1 AND b = 1 THEN c = 1

it is faster then

Code:

IF a = 1 THEN IF b = 1 THEN c = 1

:???: