create barcode with vb.net Logical Operators in Java

Create QR in Java Logical Operators

Logical Operators
QR Code 2d Barcode Generator In Java
Using Barcode drawer for Java Control to generate, create QR Code image in Java applications.
QR Recognizer In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
As you saw in the previous section, an if statement is a conditional statement that tells Java to evaluate a relational expression Based on whether or not the relational expression is true, Java either executes or skips statements within an if statement There are times when you ll need Java to evaluate two relational expressions to determine whether statements are to be executed or not This happens when your program validates a user ID and password In this case, both conditions must be true for Java to execute statements contained in the if statement There are other occasions when statements are executed if either relational expression is true For example, a person might enter a valid user ID or a guest ID into your program Either is acceptable In order to have Java evaluate two relational expressions, those expressions must be linked together using a logical operator There are three logical operators, as shown in Table 3-4 These are AND (&&), OR (||), and the ternary ( :) operators
Create Barcode In Java
Using Barcode printer for Java Control to generate, create bar code image in Java applications.
Scan Bar Code In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
CHAPTER 3 Expressions and Statements
Create QR Code JIS X 0510 In C#.NET
Using Barcode encoder for Visual Studio .NET Control to generate, create QR Code JIS X 0510 image in .NET applications.
QR Code 2d Barcode Maker In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create QR image in ASP.NET applications.
Example a == b && b == c
Quick Response Code Drawer In Visual Studio .NET
Using Barcode drawer for Visual Studio .NET Control to generate, create QR image in Visual Studio .NET applications.
Quick Response Code Maker In Visual Basic .NET
Using Barcode generator for Visual Studio .NET Control to generate, create QR Code ISO/IEC18004 image in .NET framework applications.
Operation AND
Draw Barcode In Java
Using Barcode creator for Java Control to generate, create bar code image in Java applications.
ANSI/AIM Code 39 Generator In Java
Using Barcode maker for Java Control to generate, create Code 3 of 9 image in Java applications.
Operator &&
Make Bar Code In Java
Using Barcode drawer for Java Control to generate, create barcode image in Java applications.
Printing Code 128 Code Set B In Java
Using Barcode generator for Java Control to generate, create USS Code 128 image in Java applications.
Comment If the first relational expression is false, then the second relational expression is not evaluated
Code 11 Generator In Java
Using Barcode encoder for Java Control to generate, create Code 11 image in Java applications.
Generating Bar Code In .NET
Using Barcode maker for ASP.NET Control to generate, create barcode image in ASP.NET applications.
If the first relational expression is true, a == b || b == c then the second relational expression is not evaluated If the first relational expression is false, then the second relational expression is also evaluated If the first relational expression is true, then the second relational expression is also evaluated If the conditional expression is true, a == 50 b : c then use the first value (ie, b), otherwise, use the second value (ie, c)
Creating Bar Code In Java
Using Barcode printer for Eclipse BIRT Control to generate, create barcode image in BIRT applications.
Making Code 3 Of 9 In None
Using Barcode drawer for Office Excel Control to generate, create Code39 image in Excel applications.
Ternary if-then-else
Encoding Bar Code In Java
Using Barcode encoder for BIRT reports Control to generate, create barcode image in BIRT applications.
DataMatrix Reader In VS .NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET applications.
Table 3-4
Encode UCC-128 In Java
Using Barcode generation for Eclipse BIRT Control to generate, create UCC - 12 image in BIRT reports applications.
Barcode Reader In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
Logical Operators
The AND Logical Operator (&&)
The AND logical operator is used to check to see if the results of two relational expressions are true If both relational expressions are true, then the AND logical operator returns a Boolean true If one or both relational expression is false, then the AND logical operator returns a Boolean false The following example illustrates how to use the AND logical operator in a program This example determines whether a student passes or fails a course The first statement within the main() method declares two integer variables that are used to store the grade for the final exam and the grade for the class project Both of these are initialized with a grade Two relational expressions are used in an if statement to determine whether the word pass or fail should be displayed on the screen These expressions are linked together using the AND logical operator This might look a bit confusing, but it isn t Here s what Java is being told to do: First, Java is told to evaluate the relational expression on the left of the AND logical operator This relational expression asks the question, is the value of the gradeFinalExam variable greater than or equal to 70 The answer is true The value of gradeFinalExam is 80
Java Demystified
Next, Java is told to evaluate the relational expression on the right of the AND logical operator This relational expression asks the question, is the value of variable gradeClassProject greater than or equal to 70 The answer is true because the value of the gradeClassProject variable is 90 Java is then asked to compare the results of both of these relational expressions The AND logical operator asks the question, are both relational expressions true If so, then Java is told to execute the statement within the if statement If either relational expression is false, then Java is told to execute the statement within the else statement
class Demo { public static void main (String args[]) { int gradeFinalExam = 80, gradeClassProject =90; if (gradeFinalExam >= 70 && gradeClassProject >= 70) { Systemoutprintln ("Pass ); } else { Systemoutprintln ("Fail ); } } }
The OR Logical Operator (||)
The OR logical operator is also used to check the results of two relational expressions to see if they are true However, only one of those relational expressions needs to be true for the OR logical operator to return a Boolean true The OR logical operator returns a Boolean false only if both relational expressions are false Let s take a look at how this works in this next example This example is a slight modification of the previous example Notice that the grade for the final exam is initialized to 60 However, the student needs only to receive a passing grade for either the final exam or the class project in order to pass the course The OR logical operator is used to link together both relational expressions in the if statement Java is told to perform basically the same evaluations of these relational expressions as performed in the previous example However, the final step is for Java to determine whether either of the relational expressions is true If so, then the OR logical operator returns a Boolean true, which is the case in this example
Copyright © OnBarcode.com . All rights reserved.