Java Variables

Morphmaster · 26-06-2005, 18:49

Variables.

What's a variable? Let's suppose x=5.

x is a variable. At the time of the statement, x happens to be 5. Can x be something else? Sure, x=6. Now x equals 6. (Hence the name "variable"... it's value can vary.)

Can a variable be something other than a number? Sure. How about x="Joe". Now x equals the string "Joe". (A string by the way is a string of characters).

Can the name of a variable be something other than a letter like x? Sure, myname="Joe". Simple.

How can we incorporate this new found knowledge into our function? Easy...

<HTML>
<HEAD>
<TITLE></TITLE>

<SCRIPT language="javascript"></SCRIPT>

</HEAD>
<BODY>

<A HREF="javascript:HelloWorld()">Hello</A>

</BODY>
</HTML>

Try it.

(Note the first example had quotes around the string in the alert command*, but when we used a variable, there were no quotes.)

*Technically it's the alert method, but we'll get into that later. Command is fine for now and is probably a better description anyway :-)

We could make it say Hello + variable...

<HTML>
<HEAD>
<TITLE></TITLE>

<SCRIPT language="javascript"></SCRIPT>

</HEAD>
<BODY>

<A HREF="javascript:HelloWorld()">Hello</A>

</BODY>
</HTML>

26-06-2005, 18:49	#1 (permalink)
Morphmaster Ultimo Supremo Join Date: May 2005 Location: /public_html/Cgi-bin/ Posts: 1,417 iTrader: 0 / 0%	Java Variables Variables. What's a variable? Let's suppose x=5. x is a variable. At the time of the statement, x happens to be 5. Can x be something else? Sure, x=6. Now x equals 6. (Hence the name "variable"... it's value can vary.) Can a variable be something other than a number? Sure. How about x="Joe". Now x equals the string "Joe". (A string by the way is a string of characters). Can the name of a variable be something other than a letter like x? Sure, myname="Joe". Simple. How can we incorporate this new found knowledge into our function? Easy... <HTML> <HEAD> <TITLE></TITLE> <SCRIPT language="javascript"><!-- function HelloWorld() { myname = "Joe"; alert (myname); } //--></SCRIPT> </HEAD> <BODY> <A HREF="javascript:HelloWorld()">Hello</A> </BODY> </HTML> Try it. (Note the first example had quotes around the string in the alert command, but when we used a variable, there were no quotes.) Technically it's the alert method, but we'll get into that later. Command is fine for now and is probably a better description anyway :-) We could make it say Hello + variable... <HTML> <HEAD> <TITLE></TITLE> <SCRIPT language="javascript"><!-- function HelloWorld() { myname = "Joe"; alert ("Hello " + myname); } //--></SCRIPT> </HEAD> <BODY> <A HREF="javascript:HelloWorld()">Hello</A> </BODY> </HTML> __________________ Thanks Tom Have you ever thought what it's like, to be wanderers in the fourth dimension? Have you? To be exiles?

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