Question

Chp 4-
Values and Data Types in Java:-

Q13) B.
Following are some invalid integer types given. Explain why they are not valid.
(a) 124.7
(b) 2,000
(c) 80 789

Answer 1

(a)
java has eight (8) primitive built in data-type.
1. byte
2. int
3. short
4. long
5. float
6. double
7. char
8. boolean
(b)
(i) 124.7 is not a whole no. it's fractional value so it store either in double or float data type.
(ii)2, 000 it's invalid because we cant use (, ) in between number so invalid.
=>optional :: for giving space in between number we used underscore(_)
example 2_000 it valid. try it.
(iii) due to space

Answer 2

Answer:

124.7= it is not a whole no.

2,000=it is invalid because we can't use , in between valid no.

80 789= because there is space in between

Explanation:

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