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JavaScript Tutorial

  1. JavaScript Browser Objects Part 2
  2. JavaScript Frame object
  3. JavaScript Form Object
  4. JavaScript FileUpload Object
  5. JavaScript Event Object Properties and Methods
  6. JavaScript Event Object
  7. JavaScript Elements and Embed Objects
  8. JavaScript Applet Objects
  9. JavaScript Browser Objects
  10. JavaScript Object Oriented Features
  11. JavaScript Window Object Open Method Part 2
  12. JavaScript Window Object Open Method
  13. JavaScript Window Object Timeout Methods
  14. JavaScript Location Object
  15. JavaScript Location Object Properties
  16. JavaScript History Object Properties and Methods
  17. JavaScript Document Object Methods Part II
  18. JavaScript Document Object Methods Part I
  19. JavaScript Document Object Properties
  20. JavaScript Document Object
  21. JavaScript Windows Object Properties Part II
  22. JavaScript Windows Object Properties Part I
  23. JavaScript DOM Window Object
  24. Working with JavaScript DOM Objects
  25. JavaScript Array Object Methods – Part II
  26. JavaScript Array Object
  27. JavaScript Array Object Methods – Part I
  28. JavaScript Boolean Object
  29. JavaScript OnError Event
  30. JavaScript Exception Handling – Part II
  31. JavaScript Exception Handling – Part I
  32. JavaScript Event Handler
  33. JavaScript Events Handling
  34. JavaScript Array Operations
  35. JavaScript Two Dimensional Arrays
  36. Passing values to JavaScript Function
  37. JavaScript Functions
  38. JavaScript Arrays
  39. JavaScript Iterative Structures - Part II
  40. JavaScript Iterative Structures - Part I
  41. JavaScript Math Object
  42. JavaScript Date Object
  43. JavaScript String Object
  44. JavaScript Objects
  45. JavaScript Confirm Box
  46. JavaScript Alert Box
  47. JavaScript Conditional Statements Part 2
  48. JavaScript Conditional Statements Part 1
  49. How to use JavaScript in HTML page
  50. JavaScript Variables
  51. JavaScript Features
  52. JavaScript Introduction

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Home arrow Technical Training arrow JavaScript Tutorial

Accessing JavaScript array elements

Page 2 of 2
Author : Exforsys Inc.     Published on: 7th Jun 2007

JavaScript Arrays

Accessing the elements in an array:

An element in an array can be accessed by referring to the name of the array, followed by open braces [inside which the index number of the element to be accessed is placed and then the braces are closed using].

The index of an array in JavaScript starts with 0.

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For example,

if a programmer wants to write the element “Institute” define in the array exforsys below.

It is written as follows:


var Exforsys=new Array( )

Exforsys[0]=”
Training
Exforsys[1]=”
Division
Exforsys[2]=”
Institute
Exforsys[3]=”
Company

document.write(exforsys[2])

will write Institute as output.

 

 

 

Editing the values or elements in an array:

It is also possible that the value or elements of the array defined can be edited or modified.

This is written using the same approach for accessing array elements.

For example,

if a programmer wants to change the value of “Division” to “Output” it can simply be written as follows:


Exforsys[1]=”Output”

Literal Array:

General format for defining the literal array is as follows:


var variablename=[“element1”,”element2”,…….]

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For example, if a programmer wants to define an array named exforsys with the first element “Example”, the second and third elements of the array as undefined and the fourth element as “Training”, it can be written as follows:


var Exforsys=[“Example”, , , “Training”]

Thus, using this method, the programmer has the flexibility to leave elements undefined between the arrays.



 
This tutorial is part of a JavaScript Tutorial tutorial series. Read it from the beginning and learn yourself.

JavaScript Tutorial

  1. JavaScript Browser Objects Part 2
  2. JavaScript Frame object
  3. JavaScript Form Object
  4. JavaScript FileUpload Object
  5. JavaScript Event Object Properties and Methods
  6. JavaScript Event Object
  7. JavaScript Elements and Embed Objects
  8. JavaScript Applet Objects
  9. JavaScript Browser Objects
  10. JavaScript Object Oriented Features
  11. JavaScript Window Object Open Method Part 2
  12. JavaScript Window Object Open Method
  13. JavaScript Window Object Timeout Methods
  14. JavaScript Location Object
  15. JavaScript Location Object Properties
  16. JavaScript History Object Properties and Methods
  17. JavaScript Document Object Methods Part II
  18. JavaScript Document Object Methods Part I
  19. JavaScript Document Object Properties
  20. JavaScript Document Object
  21. JavaScript Windows Object Properties Part II
  22. JavaScript Windows Object Properties Part I
  23. JavaScript DOM Window Object
  24. Working with JavaScript DOM Objects
  25. JavaScript Array Object Methods – Part II
  26. JavaScript Array Object
  27. JavaScript Array Object Methods – Part I
  28. JavaScript Boolean Object
  29. JavaScript OnError Event
  30. JavaScript Exception Handling – Part II
  31. JavaScript Exception Handling – Part I
  32. JavaScript Event Handler
  33. JavaScript Events Handling
  34. JavaScript Array Operations
  35. JavaScript Two Dimensional Arrays
  36. Passing values to JavaScript Function
  37. JavaScript Functions
  38. JavaScript Arrays
  39. JavaScript Iterative Structures - Part II
  40. JavaScript Iterative Structures - Part I
  41. JavaScript Math Object
  42. JavaScript Date Object
  43. JavaScript String Object
  44. JavaScript Objects
  45. JavaScript Confirm Box
  46. JavaScript Alert Box
  47. JavaScript Conditional Statements Part 2
  48. JavaScript Conditional Statements Part 1
  49. How to use JavaScript in HTML page
  50. JavaScript Variables
  51. JavaScript Features
  52. JavaScript Introduction
 

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