Describe logical operators in java, JAVA Programming

Assignment Help:

Describe Logical Operators in Java ?

The relational operators you've learned so far (<, <=, >, >=, !=, ==) are enough while you only required to check one condition. Therefore what if a particular action is to be taken only if various conditions are true? You can use a series of if statements to test the conditions, as follow:

if (x == 2) {
if (y != 2) {
System.out.println("Both conditions are true.");
}
}

This, therefore, is hard to write and harder to read. It just gets worse as you add more conditions. Providentially, Java gives an easy way to handle multiple conditions: the logic operators. There are three logic operators, &&, || and !.
&& is logical and. && merges two boolean values and returns a boolean that is true if and only if both of its operands are true. For example

boolean b;
b = 3 > 2 && 5 < 7; // b is true
b = 2 > 3 && 5 < 7; // b is now false
|| is logical or. || combines two boolean variables or expressions and returns a result in which is true if either or both of its operands are true. For example

boolean b;
b = 3 > 2 || 5 < 7; // b is true
b = 2 > 3 || 5 < 7; // b is still true
b = 2 > 3 || 5 > 7; // now b is false
The last logic operator is ! which means not. It reverses the value of a boolean expression. Thus if b is true !b is false. If b is false !b is true.

boolean b;
b = !(3 > 2); // b is false
b = !(2 > 3); // b is true
These operators permit you to test multiple conditions more simply. For instance the previous example can now be written as
if (x == 2 && y != 2) {
System.out.println("Both conditions are true.");
}
That's a lot clearer.


Related Discussions:- Describe logical operators in java

What is heuristic, What is heuristic? Heuristic is a procedure which co...

What is heuristic? Heuristic is a procedure which commonly, but not always, works or that provides nearly the right answer.

USES OF JAVA PROGRAMMING, WHY WE USE JAVA IN PROGRAMMING INSTEAD OF OTHER P...

WHY WE USE JAVA IN PROGRAMMING INSTEAD OF OTHER PROGRAMMING LANGUAGE

Implement decision tree algorithm using netbeans, Implement Decision Tree A...

Implement Decision Tree Algorithm using Netbeans (Java) & Microsoft Access 2007. "One Level is enough, output should contains gain of each attribute, the selected attribute and

Describe two reasons driving the termination of processes, Question 1: ...

Question 1: (a) Describe two reasons driving the termination of processes. (b) Discuss the five main steps the OS would implement once it has decided to create a new proc

Student, short Java application that stores words in an Array or ArrayList....

short Java application that stores words in an Array or ArrayList.

Mine craft plug-in coder, Mine craft plug-in Coder Project Description: ...

Mine craft plug-in Coder Project Description: Some custom plugging for my Mine craft server. Skills required: Java, Editing

Servlet, how to request one servlet to another by passing value

how to request one servlet to another by passing value

Application rewrite, Application Rewrite Project Description: There i...

Application Rewrite Project Description: There is an app that I want to be rewritten in order to support multiple profiles. The App is an OTP generator. It is required to

How to evaluate two words similarity, I need to get how to start the java p...

I need to get how to start the java program to evaluate the simillarity.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd