JAVASCRIPT

HOW TO LOOP THROUGH AN ARRAY IN JAVASCRIPT

If you have an array created in javascript and you want to perform certain action/s on some or all of the elements, you will have to loop through them. This is achieved by using a for loop as the following example illustrates:

var scores=new Array("204", "155", "278");

var sizeScores=scores.length;

for(i=0; i < sizeScores; i++)
{
document.write(scores[i] + "<br>");
}

The above example will display all the array elements as follows:



Now suppose we want to be selective and display only the score that is more than 200, then we do:

var scores=new Array("204", "155", "278");

var sizeScores=scores.length;

for(i=0; i < sizeScores; i++)
{
if(scores[i] > 200)
{
document.write(scores[i] + "<br>");
}
}

The above example will display only the array elements that have a value exceeding 200 as follows:



Now Read:

How To Create An Array

How To Get Array Size

How To Loop Through An Array

How To Add Elements To An Array

How To Join Array Elements

How To Reverse Element Order In An Array

How To Slice Elements Of An Array Into Pieces

How To Sequentially Sort Elements In An Array