Visit Our UNIX and Linux User Community


mathematics operations in unix


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers mathematics operations in unix
# 1  
Old 11-20-2001
mathematics operations in unix

Hello guys!

Can say me anybody about operatios with unix, I don't to make operations, only inside in a variable, like this

#y=4
#x=2
#let z=$y-$x
#echo $z
# 2

but I can't to make mathematical operations with decimal like this

#y=3.2
#x=1.5
#let z=$y-$x
#echo $z
# 3

this operations, I get result integers.

Smilie
# 2  
Old 11-20-2001
That's right. The shell's built-in arithmetic is integer only. Try using bc instead...

y=3.2
x=1.5
z=`echo $y - $x | bc`
echo $z
# 3  
Old 11-22-2001
Thanks for my question answer

I apreciate the help you gave me about my mathematic problem, it help me a lot.

Thanks Perderabo
 

Previous Thread | Next Thread
Test Your Knowledge in Computers #702
Difficulty: Medium
The MySQL LIKE operator is a logical operator that tests whether a string contains a specified pattern.
True or False?

8 More Discussions You Might Find Interesting

1. What is on Your Mind?

Forum Trivial Pursuit - New Computer Science and Mathematics Trivia for UNIX.com

I have added a new experimental "Computer Science and Mathematics Trivia - True or False" section in the discussions, currently under the tags box. In the future, I plan to Expand this feature to add more trivia categories from math, science and technology. Keep track of correct and... (20 Replies)
Discussion started by: Neo
20 Replies

2. Shell Programming and Scripting

To skip operations in UNIX shell

hi i am having a acript for which i need to skip the execution of some lines and to continue with remaining lines for eg script.sh rm text for i in * do . . . . . if then rm i want to skip the execution of the lines and to start with (11 Replies)
Discussion started by: rohit_shinez
11 Replies

3. Shell Programming and Scripting

Which is the best way/command to do mathematics in UNIX scripting?

Hello all! I used to use expr for doing simple mathematics, but has a main advantage and a main disadvantage: The advantage is that it can take variables for numbers (e.g.{1}: echo "Give me first" read lol echo "Give other" read lil sum=`expr $lol + $lil` echo "The sum of $lol and $lil =... (5 Replies)
Discussion started by: hakermania
5 Replies

4. IP Networking

What is the best Unix-like for firewalling operations

Hello from France, I'd like to have your opinion on this : What unix-like would you choose for high bandwidth netwoking operations like a cluster of statefull firewalls ? NetBSD, Linux, others ? Thank you. Best regards. Vincent. (0 Replies)
Discussion started by: vrzs
0 Replies

5. Shell Programming and Scripting

Date operations in Unix?

Hi Friends, I need help in below requirements, 1. I have to get current datetime + <mins> into a variable 2. I have to compage dates like, A=01-JAN-2009 10:20:10 B=01-JAN-2009 10:30:00 C=<same format date as above> I have to find whether, 1. C is less than A OR, 2. C is greater... (7 Replies)
Discussion started by: smr_rashmy
7 Replies

6. Shell Programming and Scripting

Unix File operations

Hi, Iam having the two files as follows: file1: ASQWEDFR09876543121234512 POIUYTREW09876512345676788 ZXCVBNMKS1209888888888888 file2: ASQWEDFR09876543121234516 asdcvfgbtg@abc.com 0000000-90-1239--2008 8990---- CXADFGTU09876543121234789 asdcvfgbtg@abc.com ... (14 Replies)
Discussion started by: nivas
14 Replies

7. Shell Programming and Scripting

Unix file operations(shell script)

Hi, I want to compare two files. Files will look like as follows: file1: ASDFGHJU|1234567890123456 QWERTYUI|3456789098900890 file2: ZXCVBVNM|0987654321234567 POLKIJUYH|1234789060985478 output file should be: ASDFGHJU|1234567890123456 QWERTYUI|3456789098900890 Thnaks in advance (6 Replies)
Discussion started by: nivas
6 Replies

8. UNIX Desktop Questions & Answers

where i can find list of UNIX commands for daily operations ?

Hi There, Can anyone help, where i can find list of UNIX commands just for regulat day ro day operations Thanx MGR (1 Reply)
Discussion started by: mgoutham
1 Replies

Featured Tech Videos