You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
25 lines
521 B
Perl
25 lines
521 B
Perl
# Perl allows you to create local variables inside subroutines.
|
|
# The local variables can have the same names as any global variables.
|
|
# The local won't overwrite the global variables.
|
|
# To make a variable local, use the my command
|
|
|
|
#!/usr/bin/perl -w
|
|
|
|
$a = 1;
|
|
$b = 4;
|
|
|
|
# sum is global.
|
|
$sum = 10;
|
|
$value = add();
|
|
|
|
print "$a plus $b is $value.\n";
|
|
print "Global sum remains $sum.\n";
|
|
|
|
sub add {
|
|
# This sum is local.
|
|
my($sum) = $a + $b;
|
|
|
|
print "Local sum=$sum.\n";
|
|
return $sum;
|
|
}
|