Question

a. Which of the following are invalid variable names and why?
(i) PaidInterest
(ii) s-num
(iii) percent
(iv) 123
(V) dit km
(vi) INPUT
(vii) END
(viii) book$
(ix) ia"
(x) 2ab​

Answer 1

Answer:

2ab

Explanation:

because of ab hope it's correct