How do I print a partial array?

shampoo7 has asked for the wisdom of the Perl Monks concerning the following question: ⭐ (arrays)

I am trying to print an array. But not all the elements are intialize. i.e.

@b[0]=c; 
@b[1]=undef;
@b[3]=undef;
@b[4]=a;
[download]

so when i use print "@b", I want only @b[0] and @b[4] to be printed. How do I skip the undef elements?

Edited 2001/06/13 by Ovid

Originally posted as a Categorized Question.