JavaScript Data types
First, the basic data type:
String, number, Boolean, date, and time
JavaScript has a dynamic type
JavaScript has a dynamic type. This means that the same variables can be used for different types:
1 var x // x is undefined2var x = 6; // x is a number 3 var x = "Bill"; // x is a string
JavaScript string
A string is a variable that stores characters (such as "Rose").
The string can be any text in quotation marks. You can use single or double quotation marks:
var treename= "Rose"; var treename= ' Rose ';
JavaScript numbers
JavaScript has only one numeric type. Numbers can be with decimal points or without:
1 var x1=34.00; // use a decimal point to write 2 var x2=34; // do not use the decimal point to write
JavaScript Boolean
Boolean (logic) can have only two values: TRUE or FALSE.
JavaScript arrays
The following code creates an array named cars:
var cars=New Array (); cars[0]= "Audi"; cars[1]= "BMW"; cars[2]= "Volvo";
JavaScript Data types