3. Declaring Local Variables with "my"
Variables can be made local to their own scope by declaring them using a keyword called my. When the interpreter leaves the scope, the variable will be restored to its original value.
Here's an example:
$a = 5; $b = 1000; { my ($b); for($b=0;$b<10;$b++) { print $a, "*", $b, " = ", ($a*$b), "\n"; } } print "Now, \$b is ", $b, "\n";
If you wish to declare more than one variable as local you should use a set of parenthesis surrounding the variable list. For example: my (@array, $scalar1, %hash, $scalar2);. If you want to declare only one variable, then they are optional.