$c = $x * $y;throws error. Global symbol "$c" requires explicit package name But ,when i use $a = $x * $y perl doesn't throwing the error. 1.I used "use strict" in the program. 1. I declared two variables $x and $y as my. 2. But i didnt declared $a or $b as my..I expected Global symbol "$a" requires explicit package name for $a and $b.But it didnt. 3. When i use $c ,it throw error. I am curious to know why while $a and $b perl not throwing the error!