--------Trying with arrays------- Define array >0 1 2 3< Create a reference to $a[0] array ref: >0 1 2 3< array index ref: >0< Change array to >a b c< array ref: >a b c< array index ref: >0< --------Trying with strings------- orignal: >string< reference: >string< string: >changed string< string reference: >changed string<