Conditional Operator

The conditional operator has the following form:

variable = boolean_expression ? true_value : false_value;

It means


if boolean_expression is true
  assign true_value to variable
else if boolean_expression is false
  assign false_value to variable

 
<!DOCTYPE html>
<html>
<head>
    <title>Example</title>
    <script type="text/javascript">
    
        var num1 = 3;
        var num2 = 4;
        var max = (num1 > num2) ? num1 : num2; 
        document.writeln(max);//4

       
    </script>
</head>
<body>
</body>
</html>

Click to view the demo