Hash question

[spencerr1]

I'm doing an exercise. I have an hash. Course number => Course name

%course (

"2CPR2B" => "C Language",

"4PL400" => "Perl Language");

I'm asking for user to enter course number on cmd line and I want to print the value of the entered course number. For example

You are taking (course name) this summer

thanks Mark

[NetWallah]

Your code as posted does not compile.

The correct syntax would be:

 my %course =( "2CPR2B" => "C Language",
               "4PL400" => "Perl Language");

Now, to access the %course hash, you need to index it by a key. Hashes require the use of braces "{}" for indexing (aka subscripting). for example,

  print $course{"2CPR2B"}, "\n";

Would print out "C Language".

See List value constructors for more information on how to populate hashes, and extract from them.

The "subscripts" section of "perldoc perldata" has information on the syntax of hash subscripts.

[spencerr1]

Thanks and thanks for the heads up on the perl doc

[Anonymous Monk]

perlintro / perlfaq covers a lot of this, on prompting/chomping/asking user for input, and validating that input, see Re: MySQL Table adding with Perl and Re: DBD::mysql trouble