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Showing content from https://www.tutorialspoint.com/java/java_logical_operators_examples.htm below:

Java - Logical Operators

Java logical operators are used to perform logical operations on boolean values. These operators are commonly used in decision-making statements such as if conditions and loops to control program flow.

List of Java Logical Operators

The following table lists the logical operators in Java:

Operator Description Example && (Logical AND) Returns true if both operands are true, otherwise returns false. (A && B) returns true if both A and B are true. || (Logical OR) Returns true if at least one of the operands is true. (A || B) returns true if either A or B is true. ! (Logical NOT) Reverses the logical state of the operand. !A returns true if A is false, and false if A is true.

The following programs are simple examples which demonstrate the logical operators. Copy and paste the following Java programs as Test.java file, and compile and run the programs −

Example 1

In this example, we're creating two variables a and b and using logical operators. We've performed a logical AND operation and printed the result.

public class Test {

   public static void main(String args[]) {
      boolean a = true;
      boolean b = false;

      System.out.println("a && b = " + (a&&b));
   }
}

Output

a && b = false

Example 2

In this example, we're creating two variables a and b and using logical operators. We've performed a logical OR operation and printed the result.

public class Test {

   public static void main(String args[]) {
      boolean a = true;
      boolean b = false;

      System.out.println("a || b = " + (a||b) );
   }
}

Output

a || b = true

Example 3

In this example, we're creating two variables a and b and using logical operators. We've performed a logical Negate operation and printed the result.

public class Test {

   public static void main(String args[]) {
      boolean a = true;
      boolean b = false;
	  
      System.out.println("!(a && b) = " + !(a && b));
   }
}

Output

!(a && b) = true

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