Connie Chan wrote at Sat, 27 Jul 2002 15:15:03 +0200:
> With this, I'll have a question again =)
> how about : for (my $x = 0; $x <= 100; $x++){} ?
> In every loop, $x return the value to the middle,
> and the middle design to roll another loop or not. It is doing something similar to
>if then else,
> but it also returning vals and condition signals... So.... what is this ? And when I
>write as
> for (0..100){} there is quite no difference, still an invisible $x, as $_...
>so...sorry, dunno how
> to ask.. =)
Allthough, it's better written as
for my $x (0 .. 100) {
...
}
Looking to the perldoc, gives us the translation to the while loop:
Perl's C-style "for" loop works like the corresponding "while" loop; that means that
this:
for ($i = 1; $i < 10; $i++) {
...
}
is the same as this:
$i = 1;
while ($i < 10) {
...
} continue {
$i++;
}
There is one minor difference: if variables are declared with "my" in the
initialization section of the "for", the lex-
ical scope of those variables is exactly the "for" loop (the body of the loop
and the control sections).
Cheerio,
Janek
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