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[Javascript] "var" keyword
- From: javascript@xxxxxxxxxx (Dan Costea)
- Subject: [Javascript] "var" keyword
- Date: Tue, 23 Apr 2002 10:15:59 -0700
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Hello all,
I can declare my variables with the "var" keyord, or not. I can delete a =
variable with "delete" keyword or not. But what is the real diference =
and how should I do?
Interesting (at least for me) example:
var x =3D 1;
y =3D 2;
alert (x);
alert (y);
delete x;
alert (x);=20
delete y;
alert (y);
I am a little confused... I woul appreciate any clarification for you.
Thanks, Dan.
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2600.0" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2> Hello =
all,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I can declare my variables with =
the "var"=20
keyord, or not. I can delete a variable with "delete" keyword or not. =
But what=20
is the real diference and how should I do?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Interesting (at least for me) =
example:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>var x =3D 1;</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>y =3D 2;</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>
<DIV><FONT face=3DArial size=3D2>alert (x);
<DIV><FONT face=3DArial size=3D2>alert (y);</FONT></DIV>
<DIV> </DIV></FONT></DIV></FONT><FONT face=3DArial =
size=3D2></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>delete x;</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>alert (x); </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>delete y;</FONT></DIV>
<DIV><FONT face=3DArial size=3D2><FONT face=3DArial size=3D2><FONT =
face=3DArial=20
size=3D2><FONT face=3DArial size=3D2>alert (y);</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>I am a little confused... I woul appreciate any clarification for=20
you.</DIV>
<DIV>Thanks, Dan.</DIV></FONT></FONT></FONT></BODY></HTML>
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