Programming
Java

Question Description

Need help with my Programming question - I’m studying for my class.

I know the following Java relational expressions are valid. Can you explain to me why they are valid?

  • 5 <= 4+2

  • "Hello" != "World"

  • a < a - 0 (where a is an initialized non-local variable of integer type)

Thanks!

Student has agreed that all tutoring, explanations, and answers provided by the tutor will be used to help in the learning process and in accordance with Studypool's honor code & terms of service.

Final Answer

1. 5 <= 4+ 2 : In Java, the arithmetic operators are evaluated first before the relational operators. So, this expression is just equivalent to 5 <= (4+2) which is 5 <= 6 . In words, you are testing if 5 is smaller than or equal to 6. Of course, 5 is smaller than 6 so this expression is true.

2. In this two strings are compared. As the two strings are not same and the expression itself says "hello" not equal to "world", thus this expression is also evaluated to be true.

3. In this same logic as the first one is applied, you evaluate a < a -0 so this is same as saying a < (a - 0) which is same as a < a. But, we all know that a is equal to a, hence this expression is evaluated to be false.

piratica (39)
Boston College

Anonymous
Top quality work from this tutor! I’ll be back!

Anonymous
Heard about Studypool for a while and finally tried it. Glad I did caus this was really helpful.

Anonymous
Thank you! Reasonably priced given the quality

Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors