Multiplication (*) : Arithmetic operator « Operators « JavaScript Tutorial

The multiplication operator (*) multiplies the left operand by the right operand.

When either of the operands are strings, an attempt is made to convert the strings to numbers.

For example, the following line of code

var resultOfMult = 5 * 7;

would result in the value of 35 being stored in the variable resultOfMult.

<html>
    <script language="JavaScript">
    <!--
    aString = new String("5");
    x = aString * 6;
    document.write("x = ",x);
    -->
    </script>
</html>

If the operands are numbers, regular arithmetic multiply is performed, meaning that two positives or two negatives equal a positive, whereas operands with different signs yield a negative. If the result is too high or too low, the result is either Infinity or –Infinity.

If either operand is NaN, the result is NaN.

If Infinity is multiplied by 0, the result is NaN.

If Infinity is multiplied by any number other than 0, the result is either Infinity or –Infinity, depending on the sign of the second operand.

If Infinity is multiplied by Infinity, the result is Infinity.

2.1.Arithmetic operator
	2.1.1.	Compound assignment operators
	2.1.2.	Arithmetic Operators (+)
	2.1.3.	Append two strings together
	2.1.4.	Add string and integer together
	2.1.5.	+ (Addition) with data type conversion
	2.1.6.	+= (Addition Assignment)
	2.1.7.	Subtraction (-)
	2.1.8.	Multiplication (*)
	2.1.9.	*= (Multiplication Assignment)
	2.1.10.	Division (/)
	2.1.11.	Working With JavaScript Divide Operators
	2.1.12.	/= (Division Assignment)
	2.1.13.	Arithmetic operator in action
	2.1.14.	Unary Negation
	2.1.15.	String and addition operator (+)