What types of logical operators are in javascript?

Javascript Object Oriented Programming Programming

Logical Operators

Logic operators are used to find the logic between variables in JavaScript.There are three logical operators in JavaScript: || (OR), && (AND), ! (NOT).

The AND operator

The AND operator (&&) returns true if both expressions are true, otherwise it returns false.

Example

Live Demo

<html>
<body>
<p id="and"></p>
<script>
   var a = 200;
   var b = 300;
   document.getElementById("and").innerHTML =
   (a > 100 && b <500) + "<br>" +
   (a < 100 && b <50);
</script>
</body>
</html>

Output

true
false

The OR operator

The OR operator gives value true if one or both expressions are true.

Example

Live Demo

<html>
<body>
<p id="or"></p>
<script>
   var x = 200;
   var y = 300;
   document.getElementById("or").innerHTML =
   (x == 200 || y == 300) + "<br>" +
   (x == 200 || y == 0) + "<br>" +
   (x == 0 || y == 0)
</script>
</body>
</html>

Output

true
true
false

The NOT operator

The NOT operator gives false for true values and true for false values.

Example

Live Demo

<html>
<body>
<p id="not"></p>
<script>
   var x = 200;
   var y = 300;
   document.getElementById("not").innerHTML =
   !(x < y) + "<br>" + !(x > y);
</script>
</body>
</html>