Question

Classify the following into valid or invalid identifiers. If invalid state the
reason :
a) Avg mark
b) marklist
c) 5thname
d) $abc
e) else
f) name.list

Answer 1

Explanation:

a. no. because identifiers should have single word and no special characters should be given

" " (space) is also a special character

b. yes.

c. no. identifier should begin with alphabet and character '_'. should not begin with number

d. no. identifier should not begin with special characters

e. no. it is a keyword. keywords cannot be used as identifier

f. no. here '.' is special character. hence not a valid identifier