[Tutor] One of my 'baby step' programs

[John Fouhy]

On 03/10/06, Alan Gilfoy <agilfoy at frontiernet.net> wrote:
>
> >>>> for i in range(10):
> > ...  break
> > ... else:
> > ...  print 'foo'
> > ...
> >>>> for i in range(10):
> > ...  pass
> > ... else:
> > ...  print 'foo'
> > ...
> > foo
> >>>>
>
> pardon the newb question, but what do these code lines do?

They demonstrate when the else: clause in a for statement gets executed.

Spaces sometimes get lost in email, so I'll write them again, with
underscores instead of spaces:

for i in range(10):
____break
else:
____print 'foo'

In this case, the for loop will exit because of the break statement,
and so the else: clause will not execute.

for i in range(10):
____pass
else:
____print 'foo'

In this case, the loop body is just 'pass', which is python's
do-nothing statement.  So the loop will exit normally, and the else:
clause will execute (resulting in the string 'foo' being printed).

Does this help?

-- 
John.