String and addition operator (+) : Arithmetic operator « Operators « JavaScript Tutorial

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JavaScript Tutorial » Operators » Arithmetic operator

2.1.15.String and addition operator (+)

If the values on either side of the addition operator are strings, the strings are concatenated together.

If only one of the values is a string, the other value is converted to a string and concatenated with the first value.

<html>

<SCRIPT LANGUAGE="JavaScript">

<!--

    var sStringVar1 = "Hello";

    var sStringVar2 = "World";

    var nNumVar1 = 5;

    var nNumVar2 = 10;



    var sStringTotal = sStringVar1 + sStringVar2;

    var nNumTotal = nNumVar1 + nNumVar2;

    var sStringNumTotal = sStringTotal + nNumTotal;





    document.write("<b>The string total is: </b>"+sStringTotal+"<BR>");

    document.write("<b>The numeric total is: </b>",nNumTotal,"<BR>");

    document.write("<b>The string + numeric total is: </b>",sStringNumTotal);



-->

</SCRIPT>

</html>

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 (+)

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