Editing Foreach loop (section)

=== Tcl ===
[[Tcl]] uses foreach to iterate over lists. It is possible to specify more than one iterator variable, in which case they are assigned sequential values from the list. 
{| class="wikitable"
! code !! prints
|-
|
<syntaxhighlight lang=Tcl>
foreach {i j} {1 2 3 4 5 6} {
    puts "$i $j"
}
</syntaxhighlight>
|
 1 2
 3 4
 5 6
|}

It is also possible to iterate over more than one list simultaneously. In the following <code>i</code> assumes sequential values of the first list, <code>j</code> sequential values of the second list:
{| class="wikitable"
! code !! prints
|-
|
<syntaxhighlight lang=Tcl>
foreach i {1 2 3} j {a b c}  {
    puts "$i $j"
}
</syntaxhighlight>
|
 1 a
 2 b
 3 c
|}