for / while else doesn't make sense

[BartC]

On 15/06/2016 18:03, Rustom Mody wrote:

> OTOH Duff's device shows terrifyingly unstructured code with nary a goto/break
> in sight

I agree, and these mostly originate in C. It's full of crude features 
that should have been pensioned off decades ago, but amazingly it is 
still around and highly influential!

> So break also has its uses. Lets just not pretend its structured

It's a short-circuit operator that gets you to the end of the current 
loop block.

There's one here too:

    if a:
       b
       c
    else:
       d

It's called 'else' and is unconditional (when you finish executing the 
'c' line, you then skip to the end of the next block).

This is another short-circuit operator:

   if a and b(c):
      d
      e

(I assume Python has short-circuit evaluation; if not then plenty of 
languages do). When a is False, the b(c) function call is skipped.)

If that's not enough, then 'return' in most languages will let you 
return early from a routine, skipping the rest of the function.

-- 
Bartc