There is no '4' element in $array[0] for you to access. $array[0] is the string "4601". It is not an array (or an array reference), exactly like the error message you quoted says:
Can't use string ("4601") as an ARRAY ref
Because it is not an array, it has no elements for you to access.

Perhaps you're coming from C and assuming that strings are arrays of characters? If so, then you need to understand that they aren't. In Perl, a string is a basic data type. A single value. Not an array of characters.

In reply to Re^3: how to find the how many elements are present in an array by dsheroh
in thread how to access each element in an array? by rammohan

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