Logical operators are handy when you have to deal with two or more conditions. For example, if you are at a convenience store, you can pay for items if you have cash or a credit card. Or is the logical operator in this case.

You can use the following logical operators:

To see how these operators are used, enter the following code and run it:

// logical operators
 (1 == 1) && (2 == 2) // logical AND operator, true because both 
                         operands are true, so true AND true 
                         returns true
 (1 == 1) && (2 != 2) // logical AND operator, false because one                              
                         operand is false, so true AND false 
                         returns false
 (1 == 1) || (2 == 2) // logical OR operator, true because both 
                          operands are true, so true OR true 
                          returns true
 (1 == 1) || (2 != 2) // logical OR operator, true because one operand 
                         is true, so true OR false returns true
 (1 != 1) || (2 != 2) // logical OR operator, false because both 
                         operands are false, so false OR false 
                         returns false
 !(1 == 1) // logical NOT operator, false because 1==1 is true, 
               so NOT true returns false

The returned Boolean values are true, false, true, true, false, and false, and will be displayed in the Results area.

So far, you've only worked with numbers. In the next section, you'll see how you can perform operations on strings.