What is this I don't even (control structure problems)

[Miro]

I've been using Perl for about 6 months now, and I've never had issues
with this before, but when I run this following code snippet...

my $variable = "f";
if ($variable == "d"){
print ($variable . " is d\n")
}elsif ($variable == "f"){
print ($variable ." is f\n")
}

....it says "f is d"
What am I doing wrong?

 

[Bo Lindbergh]

What am I doing wrong?

You're not using the strict and warnings pragmas. Put these two lines
at the top of your program and see if you get any interesting diagnostic
messages:

use strict;
use warnings;


/Bo Lindbergh

 

[Jürgen Exner]

I've been using Perl for about 6 months now, and I've never had issues
with this before, but when I run this following code snippet...

my $variable = "f";
if ($variable == "d"){

The numerical value of the content of $variable is 0. The numerical
value of "d" is also 0. Therefore the result of the numerical equality
test == is true, therefore

print ($variable . " is d\n")

this path is executed and "f is d\n" is printed.

}elsif ($variable == "f"){
print ($variable ." is f\n")
}

...it says "f is d"
What am I doing wrong?

Maybe you meant to use string comparison "eq" instead of numerical
comparison "=="?

jue