fig06_06.pl

PERL语言资料 可以用于PERL程序设计

#!/usr/bin/perl
# Fig 6.6: fig06_06.pl
# Demonstrating a subroutine that returns a value.

# for the numbers from 1-10, call subroutine square to 
# square each value, and display each result
for ( 1 .. 10 ) {
   print square( $_ ), " ";
}

print "\n";

# subroutine square returns the square of a number
sub square
{
   $value = shift;       # use shift to get first argument
   return $value ** 2;   # returns the result of $value ** 2
}


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