Javascript global variable is undefined,why?

Question

0.00/5 (No votes)

See more:

hello please take a look at my code below

<script type="text/javascript">
var vsize; //global variable
function veg7()
{
vsize=7;
}
function veg10()
{
vsize=10;
}
function getCBP()
{
if(vsize==7)
  {
    alert(vsize);
  }
else{
  alert(vsize);
}
}
</script>

if any event access the function veg7() and function veg10() (it is dynamic) and changes the value of vsize accordingly then why am i getting vsize as undefined.

please help me..i need the value of vsize in getCBP().

Posted 20-May-15 22:46pm

Dinesh92

Add a Solution

2 solutions

Add a Solution

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Mehdi Gholam · Answer 1 · 2015-05-20T22:57:00

Solution 1

vsize will be undefined until it is set i.e. veg10() or veg7() is called.

Try this instead:

JavaScript

var vsize=0; //global variable

Posted 20-May-15 22:57pm

Mehdi Gholam

Comments

CPallini 21-May-15 5:59am

of course, 5.

Mehdi Gholam 21-May-15 7:39am

Cheers!

vivekkamate · Answer 2 · 2015-05-20T23:06:00

Here variable declared but not set value. First you need to set value either by calling veg7() function or veg10() function, then you will get value in getCBP() function.

var vsize; //global variable

function veg7()
{
vsize=7;
}
function veg10()
{
vsize=10;
}
function getCBP()
{
if(vsize==7)
{
alert(vsize);
}
else{
alert(vsize);
}
}
function init(){
veg7();
}
init();
getCBP();

Javascript global variable is undefined,why?

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0

Javascript global variable is undefined,why?

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0

Existing Members

...or Join us