Datatype Library Javascript Html5
Data Type Library Javascript Html5 File
Chapter 3. Data Types and ValuesComputer programs work by manipulatingvalues,such as the number 3.14 or the text “Hello World”. Thetypes of values that can be represented and manipulated in aprogramming language are known as data types,and one of the most fundamental characteristics of a programminglanguage is the set of data types it supports. JavaScript allows youto work with threeprimitivedata types:numbers, strings of text(known as “strings”), and boolean truth values (known as“booleans”). JavaScript also defines two trivial datatypes, null and undefined, each of which defines only a single value.In addition to these primitive data types, JavaScript supports acomposite data type known asobject.
Anobject (that is, a member of the data type object) represents acollection of values (either primitive values, like numbers andstrings, or composite values, like other objects). Objects inJavaScript have a dual nature: an object can represent an unorderedcollection of named values or an ordered collection of numberedvalues. Plastic patio table set.
In the latter case, the object is called anarray.Although objects and arrays are fundamentally the same data type inJavaScript, they behave quite differently and will usually beconsidered distinct types throughout this book.JavaScript defines another special kind of object, known as afunction.A function is an object that has executable code associated with it.A function may beinvokedto perform some kind of operation.With Safari, you learn the way you learn best. Get unlimited access to videos, live online training,learning paths, books, interactive tutorials, and more.