Question

Out of the following, find those identifiers, which cannot be used for naming Variables
Python program:
Price*qty, class, For, do,
4thcol, totally, Row31, _Amount​

Answer 1

• Price*qty

This is an invalid variable, as it has a special character (*) in it.

Variables cannot have special characters, other than an underscore (_).

• class

This is an invalid variable, as it is a keyword.

Keywords cannot be used as variables.

• For

This is a valid variable.

• do

This is a valid variable.

• 4thcol

This is an invalid variable as it starts with a number.

Variables cannot start with numbers.

• totally

This is a valid variable.

• Row31

This is a valid variable.

• _Amount

This is a valid variable.