Question

1. Which of the following are invalid identifiers?

a. one

b. “Good Bye”

c. 1234

d. DecafeLattePlease

e. $hello$ f. JAVA

g. hello, there h. acct122

i. 4you

j. _doWork

k. Wait_For_M

Answer 1

Invalid Identifiers:

b. “Good Bye” (Identifiers cannot include any special characters or punctuation marks except underscore).

c. 1234 ( Identifiers name must be begin with an alphabet or an underscore).

e. $hello$ f. JAVA (Identifiers cannot include any special characters ).

g.hello, there h. acct122 (Identifiers cannot include any special characters or punctuation marks except underscore).

i. 4you ( Identifiers name must be begin with an alphabet or an underscore).

k. Wait_For_M (Two successive underscores cannot be used at the same time.)