jQuery and JavaScript Phrasebook

Defining and Accessing Variables

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  var x = y = 5;   var z = 10;   var results = "x + y + z = " + (x+y+z);   var s1 = "jQuery";   var s2 = "JavaScript"   var s3 = s1 + " & " + s2;

JavaScript makes it easy to define variables. Variables are assigned using var name = value; syntax. The var keyword tells JavaScript that this is a new variable name. Once the variable has been assigned a value, you can access it using the variable name. You can define multiple variables on a single line using var name1 = name2 = value; syntax.

When you assign a variable to an expression, such as x + y + z, the expression is evaluated before assigning the variable a value. The following code snippet shows you how to define and access ...