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use of triadic operator
More Loops and Conditionals example from a Well House Consultants training course
More on More Loops and Conditionals [link]

This example is described in the following article(s):
   • Are you learning Perl? Some more examples for you! - [link]

Source code: qc2 Module: P206


If you're looking for an "if, then, else" which sets the same
variable in two different ways, have a look at the ? ... operator.

The syntax? Write a condition in round brackets, the result if
true after a ? and the result if false after a : (and they must
come in that order).


print "How many $what? ";

chop ($nkids = <STDIN>);

# The ? - : operator
$kw = ($nkids == 1) ? "is" : "are";

# An alternative - set a default and override if need be.

$what = "children";
$nkids == 1 and $what = "rather scruffy second hand child";

print ("There $kw $nkids $what in stock\n");


Sample output:

Dorothy-2:j10p grahamellis$ perl qc
How many ? 4
There are 4 children in stock
Dorothy-2:j10p grahamellis$ perl qc
How many ? 2
There are 2 children in stock
Dorothy-2:j10p grahamellis$ perl qc
How many ? 1
There is 1 rather scruffy second hand child in stock
Dorothy-2:j10p grahamellis$

Learn about this subject
This module and example are covered on the following public courses:
 * Perl Programming
 * Perl bootcamp
 * Learning to program in Perl
 * Perl Programming
Also available on on site courses for larger groups

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Other Examples
This example comes from our "More Loops and Conditionals" training module. You'll find a description of the topic and some other closely related examples on the "More Loops and Conditionals" module index page.

Full description of the source code
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