 |
Puppy Linux Discussion Forum Puppy HOME page : puppylinux.com "THE" alternative forum : puppylinux.info
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in|
The time now is Sat 25 May 2013, 05:50 All times are UTC - 4 |
 Forum index » Off-Topic Area » Programming |
|
bash script
|
 
|
View previous topic :: View next topic |
| Page 1 of 1 [4 Posts] |
| Author | Message | ||||||||
|---|---|---|---|---|---|---|---|---|---|
|
emily22
Joined: 06 May 2012 Posts: 3 |
hey there to all! I'm writing a bash script and I wonder what is the correct syntax for arithmetic expression when it comes to integers which are stored in variables. For example aa=23 bbb=35 cccc=479 and I want to assign: dd=$(($aa+$bbb)) or aa=$(($aa+$bbb)) or ee=$(($cccc-$aa)) Is this correct or let is working better? Also do I have to leave white spaces between operands? |
||||||||
|
|||||||||
 |
|||||||||
zigbert
 Joined: 29 Mar 2006 Posts: 5245 Location: Valåmoen, Norway |
Why not test?
_________________ Stardust resources |
||||||||
|
|||||||||
|
|||||||||
|
emily22
Joined: 06 May 2012 Posts: 3 |
yes you're right I just wanted to know if both formats are acceptable and which one is more preferable! |
||||||||
|
|||||||||
|
|||||||||
Moose On The Loose
 Joined: 24 Feb 2011 Posts: 280 |
In general, I like to leave white spaces because it makes the expression easier to read. It doesn't seem to have any impact on speed. I also use the ${AA} form of the variable use even in cases where it is not needed if it makes the expression clearer. When coding something biggish, I try to use names that make sense for what I am doing. Even though using $KBYTES takes more characters than $N, it is worth doing on something you have to maintain. |
||||||||
|
|||||||||
|
|||||||||
bash script
| Page 1 of 1 [4 Posts] |
|
|
View previous topic :: View next topic |
|
Forum index » Off-Topic Area » Programming |
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum You cannot attach files in this forum You can download files in this forum |
Powered by phpBB © 2001, 2005 phpBB Group