more than one action for if else

[Beginner]

Hi
I have tried various programming languages and if/else is a neccessity in every language.
My question is, how do I perform more than one action using if/else statements?

For example:

if <condition>
then do <this>
and <this>
and <that>

else if <condition>
then do <this>
and <this>
and <that>

Also, I keep having this "missing end if" error.

[Dixie]

Do something like...

Code: Select all

on mouseUp
   put random(2) into theChoice
   
   if theChoice = 1 then
      put "England" into theCountry
      put "Beer" into theAssociation
   else
      put "Scotland" into theCountry
      put "Whisky" into theAssociation
   end if
   
   put theCountry & comma & theAssociation
end mouseUp

Have a look at 'switch' in the dictionary if you have lots of choices to consider

[dunbarx]

As Klaus says, first start with the dictionary, then practice at home. These control structures (if-then and switch) are fully featured and amazingly powerful and flexible.

And readable, which might be the most important feature of all.

Craig Newman

[Beginner]

Oh I see, so in Livecode the indentations and paragraphing does matter,
I think I'm ok for now, thanks!

[edgore]

The formatting is done automatically by the IDE, but it has no effect on the code - if it weren't indented it would still work.

The important thing here is that an if statement is Livecode is

If *condition* then
do some stuff, could be multiple lines of code, could even have more if/thens within it
else (condition above is not met)
do other stuff. Again, could be multiple lines of code, and have other conditional statements in it
end if

The other option mentioned above is the switch statement, where you can have multiple conditions, each with their own action

switch
case condition 1
do some stuff, could be multiple lines of code
break
case condition 2
do some stuff, could be multiple lines of code
break
case condition 3
do some stuff, could be multiple lines of code
break
condition 4
do some stuff, could be multiple lines of code
break
case condition 5
do some stuff, could be multiple lines of code
default
do this stuff if none of the above conditions are met
end switch


Read up on if/then, switch and case in the dictionary for a full explanation of what they can do.

EDIT: added the case preceding the conditions in the switch statement

[dunbarx]

Edgore, like most of us, reply while driving to work. Clearly a typo, but know that "case" precedes each conditional line:

switch
case condition 1
do some stuff, could be multiple lines of code
break
case condition 2
do some stuff, could be multiple lines of code
break
case condition 3
...

[edgore]

Worse - replying in one window, doing email in another window, and working on a script in another window. While on the phone.

[jacque]

There is also the "else if" construction if you have several "if"s but you aren't using "switch":

Code: Select all

if conditionOne then
  act on condition 1
else if conditionTwo then
  act on condition 2
else if conditionThree then
  act on condition 3
end if

[edgore]

I keep forgetting that "else if - then" is available in Livecode because it's so much less readable than switch.