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JavaScript Tutorial >> JavaScript using Arrays.


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What is JavaScript Array?

Now JavaScript Tutorial will guide us that JavaScript arrays are one way of keeping a program more organized and normalize. JavaScript Arrays allow us to do some things that are difficult without them. Arrays are usually a group of the same type variable that use an index number to distinguish them from each other. And suppose we want to write out 5 names of employees at Global Guide Line, and we use JavaScript variables for each one of our employee. Then we need to define 5 JavaScript variables  like the below code...

Instead of JavaScript Array using JavaScript Variables

<script type="text/javascript">

  employee1="John";
  employee2="Smith";
  employee3="Haney";
  employee4="Lara";
  employee5="David";

</script>

Suppose we have more then 1000 employees in an organization then either we define 1000 JavaScript variables in our JavaScript.  No However, a better way may be to use an JavaScript array. To define an array, we need to follow the following steps.

Syntax of Array in JavaScript

var Name_of_Array= new Array(number_of_elements);

Name_of_Array would be the name we want to give the JavaScript array variable, the number_of_elements argument is the number of indexes we want in JavaScript array to define. So, for our employee names, we could write

Example of JavaScript Array

<script type="text/javascript">
  var employees= new Array(10);
  employees[0]="John";
  employees[1]="Smith";
  employees[2]="Haney";
  employees[3]="Lara";
  employees[4]="David";
 
  //now displaying the array elements content using JavaScript for loop
  for (i = 0; i < employees.length; i++)
  {
    document.write(employees[i].bold() + "<br/>");
  }

</script>

Output of JavaScript Array Example



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JavaScript Array Object Examples



JavaScript Variables Examples



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