Question

Which one of the following is an invalid variable name?

w_23
pq1
_st
9pq

Answer 1

Answer:

The following are examples of valid variable names: age, gender, x25, age_of_hh_head. The following are examples of invalid variable names: age_ (ends with an underscore); 0st (starts with a digit);

Answer 2

Answer:

w_23 is the invalid variable

Explanation:

hope it helps:)