Loops/Foreach: Difference between revisions

=={{header|CLU}}==

As in Python (which no doubt got the idea from CLU), every <em>for</em> loop in

CLU is really a <em>foreach</em>, and iterating over a range of numbers is done

by using an iterator (e.g. <code>int$from_to</code>).

Unlike Python, the <em>for</em> loop '''only''' accepts iterators, and collections

are not automatically cast into iterators. To loop over the elements of an array,

one needs to explicitly use the <code>elements</code> iterator.

<lang clu>start_up = proc ()

po: stream := stream$primary_output()

words: array[string] := array[string]$

["enemy", "lasagna", "robust", "below", "wax"]

for word: string in array[string]$elements(words) do

stream$putl(po, word)

end

end start_up</lang>