Language mavens: Is there a programming with "if then else ENDIF" syntax?

[MRAB]

Steve Ferg wrote:
> This is a question for the language mavens that I know hang out here.
> It is not Python related, except that recent comparisons of Python to
> Google's new Go language brought it to mind.
> 
> NOTE that this is *not* a suggestion to change Python.  I like Python
> just the way it is.  I'm just curious about language design.
> 
> For a long time I've wondered why languages still use blocks
> (delimited by do/end, begin/end, { } , etc.) in ifThenElse statements.
> 
> I've often thought that a language with this kind of block-free syntax
> would be nice and intuitive:
> 
>     if <condition> then
>         do stuff
>     elif <condition> then
>         do stuff
>     else
>         do stuff
>     endif
> 
> Note that you do not need block delimiters.
> 
> Obviously, you could make a more Pythonesque syntax by using a colon
> rather then "then" for the condition terminator.  You could make it
> more PL/I-like by using "do", etc.
> 
> You can write shell scripts using if ... fi, but other than that I
> don't recall a language with this kind of syntax.
> 
> Does anybody know a language with this kind of syntax for
> ifThenElseEndif?
> 
> Is there any particular reason why this might be a *bad* language-
> design idea?

Ada and Turing have:

     if <condition> then
         do stuff
     elsif <condition> then
         do stuff
     else
         do stuff
     end if

Comal has:

     if <condition> then
         do stuff
     elif <condition> then
         do stuff
     else
         do stuff
     end if

Modula-2 has:

     if <condition> then
         do stuff
     elsif <condition> then
         do stuff
     else
         do stuff
     end