JavaScript:Tutorial, Using Arrays

**TcM** · #1 (**permalink**) 12-03-2006, 09:52 AM

Introduction:-
Usually this is a difficult thing when it comes to programming and usually people get mixed up with arrays.

Solution:-
Make this Function between the <head> tags:-

Code:

<SCRIPT language="JavaScript">

function array_use()
{

var msg= new Array(8)
msg[0]="Msg1";
msg[1]="Msg2";
msg[2]="Msg3";
msg[3]="Msg4";
msg[4]="Msg5";
msg[5]="Msg6";
msg[6]="Msg7";
msg[7]="Msg8";

var i=0;



for (i=0; i<8; i++)

  {
     alert(msg[i]);
  }

}

</SCRIPT>

Instead of

Code:

var msg= new Array(8)
msg[0]="Msg1";
msg[1]="Msg2";
msg[2]="Msg3";
msg[3]="Msg4";
msg[4]="Msg5";
msg[5]="Msg6";
msg[6]="Msg7";
msg[7]="Msg8";

You can make (Untested)

Code:

var msg = new Array("msg1","msg2","msg3","msg4","msg5","msg6","msg7","msg8");

And call it with something like this:-

Code:

<BODY onLoad="array_use()">

Explanation:-

Code:

for (i=0; i<8; i++)

  {
     alert(msg[i]);
  }

This is a Loop that will display a msg and increase i by one every time and it will go on until i<8

A Preview:-

Conclusion:-
As Always Feedback is welcome and the full source is attached!!

RikkoSuperb · #2 (**permalink**) 08-23-2007, 09:03 AM

What else can you do with arrays? I have used them in coursework but the examples are lame - like amount of books borrowed from a library that are printed to the document for the user to view. wow. ground breaking stuff? methinks not.

Rohit · #3 (**permalink**) 06-25-2008, 01:34 AM

Thanks to share this information,good information about how we can use array in <head> tag

**TcM** · #4 (**permalink**) 06-25-2008, 03:02 AM

Welcome.

Thanks for positive comment.

**Xav** · #5 (**permalink**) 06-25-2008, 03:18 PM

Your code isn't particularly efficient. A shorter way to declare an array like that:

javascript Code:

var msg = new Array("msg1","msg2","msg3","msg4","msg5","msg6","msg7","msg8");

**TcM** · #6 (**permalink**) 06-25-2008, 04:22 PM

These tutorials are not about efficiency, but about getting the basic thing and the concept of it into the readers mind.

**Xav** · #7 (**permalink**) 06-26-2008, 11:08 AM

I'm just saying, it's an awful lot of code there, which could easily be simplified.

**TcM** · #8 (**permalink**) 06-26-2008, 12:33 PM

Yeah, but makes it harder for someone trying to learn the concept of Arrays.

**Xav** · #9 (**permalink**) 06-26-2008, 12:34 PM

I can't see how it is harder - if anything it's easier, because you don't need to concern yourself with array indices - simply define the elements.

**TcM** · #10 (**permalink**) 06-26-2008, 12:37 PM

But as Arrays start with 0 and not with 1, if you don't make those indices, they might get confused. And they will not understand the concept of

Code:

alert(msg[i]);

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