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What does "exclamation mark" (!) mean on xubuntu eviroment? Eclipse program. [message #1727488]

Wed, 23 March 2016 10:58

Patrizia De Beneetis

Messages: 1
Registered: March 2016

Junior Member

Hi fellows.

I wanted to know what does the exclamation mark mean?

For example:

while(!try(second)) ..

Does it refer to any previous used information on my code?

Thanks.

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Re: What does "exclamation mark" (!) mean on xubuntu eviroment? Eclipse program. [message #1727496 is a reply to message #1727488]

Wed, 23 March 2016 11:15

Eike Stepper

Messages: 6515
Registered: July 2009

Senior Member

Am 23.03.2016 um 12:03 schrieb Patrizia De Beneetis:
> Hi fellows.
>
> I wanted to know what does the exclamation mark mean?
>
> For example:
>
> while(!try(second)) ..
In the absence of any context information I can only suspect that it refers to the boolean NOT operator, which turns
true into false and false into true.

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

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Re: What does "exclamation mark" (!) mean on xubuntu eviroment? Eclipse program. [message #1727528 is a reply to message #1727488]

Wed, 23 March 2016 14:30

Russell Bateman

Messages: 3798
Registered: July 2009
Location: Provo, Utah, USA

Senior Member

On 03/23/2016 05:03 AM, Patrizia De Beneetis wrote:
> Hi fellows.
>
> I wanted to know what does the exclamation mark mean?
>
> For example:
>
> while(!try(second)) ..
>
> Does it refer to any previous used information on my code?
> Thanks.

This has nothing to do with XUbuntu. It's a language construct in C/C++
and Java (you give no context). You're learning to write code using
Eclipse? Such language-oriented question are better posted in forums
like javaranch.com and stackoverflow.com. Ask questions here about how
to download, install, set up and use Eclipse.

Best of luck!

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