On May 26, 2010, at 9:43 AM, Andros Zuna wrote:
> Ok, I see, so the code should look somehow like this:
>
> #!
> /usr/bin/perl
>
> use
> warnings;
> use
> strict;
>
>
> $command = "ls
> -l";
^^ Strongly suggest you use full paths here.
>
> while (system($command) != 0)
> {
> my
> $c++
> }
You should declare $c outside of the loop, and increment it inside of the loop.
Like so:
my $c = 0;
while (system($command) != 0) {
$c++;
}
print "The count is: $c\n";
>
> But how could I test if the command executes if the return value changes?
>
Well that changes things a bit. If you want to actually execute different
blocks of code for different return values, then you need to combine the while
loop with an if/else, like so:
my $loop = 1;
my $c = 0;
while ($loop) {
if (system($command) == 0) {
$loop = 0; ## End the loop
## Code here for zero return
} else {
## Code here for non-zero return
}
$c++;
}
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