Perl Breaking out of an If statement

Question

This one just came up: How do I break out of an if statement? I have a long if statement, but there is one situation where I can break out of it early on.

In

Answer 1

I was inspired by DVK's answer to play around, and I came up with this variant that works at least on Perl 5.26.1:

for( ; some_condition ; last ) {
    blah, blah, blah
    last if $some_other_condition; # No need to continue...
    blah, blah, blah    
}

Per perlsyn, this is equivalent to:

while (some_condition) {
    blah, blah, blah
    last if $some_other_condition; # No need to continue...
    blah, blah, blah    
} continue {
    last;
}

In a continue block, last has the same effect as if it had been executed in the main loop. Therefore, the loop will execute zero or one times, depending on some_condition.

Tests

perl -E 'my ($cond, $other)=(X, Y); 
         for(;$cond;last) { say "hello"; last if $other; say "goodbye" }'

has the following results, for various X and Y values:

X Y   Prints
-----------------------
0 0   (nothing)
0 1   (nothing)
1 0   hello, goodbye
1 1   hello