Multiply

The multiply operator is *.

 
<!DOCTYPE html>
<html>
<head>
    <title>Example</title>
    <script type="text/javascript">
    
        var result = 3 * 5; 
        document.writeln(result); //15

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

Click to view the demo

If either of the operands isn't a number, it is converted to a number using the Number() casting function. An empty string is treated as 0, and the Boolean value of true is treated as 1.

The multiply operator has the following behaviors:

OPERAND 1	OPERAND 2	RESULT
number	number	regular arithmetic multiplication, may have result of Number.NEGATIVE_INFINITY or Number.POSITIVE_INFINITY
any value	NaN	NaN
NaN	any value	NaN
Number.POSITIVE_INFINITY	0	NaN
Infinity	any finite number other than 0	Number.NEGATIVE_INFINITY or Number.POSITIVE_INFINITY depending on the sign of the second operand
Infinity	Infinity	Infinity