Logical operators in java

Let’s learn logical operators in java.

Logical operators in java

Logical operators combine multiple conditional statements which returns boolean (true/false) output. Logical operators are very similar to OR gate and AND gate in digital electronics.

Logical operators is only applicable for boolean types. There are three types of logical operators,

• Logical AND (&&) operator
• Logical OR (||) operator
• Logical NOT (!) operator

Logical AND (&&) operator: logical AND (&&) returns true only when both the conditions are true.

Syntax: condition1 && condition2

Example:

Let’s see java program on Logical AND (&&) operator.

public class LogicalANDOperator 
{
   public static void main(String[] args) 
   {
      boolean b1 = true;
      boolean b2 = true;
      if(b1 && b2)
      {
         System.out.println("True");
      }
      else
      {
         System.out.println("False");
      }
   }
}

Output:

True

Logical OR (||) operator: logical OR (||) returns true only when one of the conditions are true.

Syntax: condition1 || condition2

Example:

Let’s see java program on Logical OR (||) operator.

public class LogicalOROperator 
{
   public static void main(String[] args) 
   {
      boolean b1 = false;
      boolean b2 = true;
      if(b1 || b2)
      {
         System.out.println("True");
      }
      else
      {
         System.out.println("False");
      }
   }
}

Output:

True

Logical NOT (!) operator: logical NOT (!) returns true if condition is false and if condition is true it returns false. Logical NOT (!) operator is an unary operator.

Syntax: !(condition)

Example:

Let’s see java program on Logical NOT (!) operator.

public class LogicalNOTOperator 
{
   public static void main(String[] args) 
   {
      boolean b1 = false;
      boolean b2 = true;
      System.out.println("b1 is : " + b1);
      System.out.println("b2 is : " + b2);
      System.out.println("Not (!b1) is : " + !b1);
      System.out.println("Not (!b2) is : " + !b2);
   }
}

Output:

b1 is : false
b2 is : true
Not (!b1) is : true
Not (!b2) is : false

Also read – interface in java