05-22-2009
you can use different commnds such as
1)expr
2)bc
3)shell ("echo $((4+5))")
likewise..
read man page for more info
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have no idea why I can't get this to work, if anybody can help i would appreciate it.
#!/bin/bash
x=`cat counter.txt | wc -l`
y= '$x / 7'
printf "%d People have visited this page" $y
:confused: (2 Replies)
Discussion started by: paladyn_2002
2 Replies
2. Shell Programming and Scripting
Hi,
I am new to unix and using linux 7.2. I would like to create a script that would make it easyer for me to run my java programms. At the moment I have to type java myJavaprogram
I am trying to write a script that will allow me to type something like this "myscript myJavaprogram" or maybe... (4 Replies)
Discussion started by: cmitulescu
4 Replies
3. Shell Programming and Scripting
I am begining to learn bourne shell and as a practice I have written a script which when given the purchase price and percentage of discount calculates the savings.
I somehow cannot figure out why my script fails to do arthimatic calculation on real numbers.
Could anyone look at the script... (5 Replies)
Discussion started by: Tirmazi
5 Replies
4. Post Here to Contact Site Administrators and Moderators
page
unix com/answers-frequently-asked-questions/13785-yesterdays-date-date-arithmetic.html
Date Arithmetic with the Shell
has link of
www samag com/documents/s=8284/sam0307b/0307b.htm
which is no longer.
Is this the correct place to post this?:confused:
and I got message... (1 Reply)
Discussion started by: dgerman
1 Replies
5. Shell Programming and Scripting
Hello everybody,
I decided to take a Unix Introduction class and have never had experience with programming. Everything was fine until recently when the Prof. started shell scripting and he wants us to make a small script to add unlimited numbers from arguments and from standard input.
I... (1 Reply)
Discussion started by: Florinel76
1 Replies
6. Homework & Coursework Questions
Hello everybody,
I decided to take a Unix Introduction class and have never had experience with programming. Everything was fine until recently when the Prof. started shell scripting and he wants us to make a small script to add unlimited numbers from arguments and from standard input.
I... (8 Replies)
Discussion started by: Florinel76
8 Replies
7. Shell Programming and Scripting
I need help on arithmetic
root@server # hour=`date | awk {'print $4'} | cut -d: -f 1`; echo $hour
04
Now I subtract this result by 1 or 01 I get "3" as the answer. I need "03" as the answer, ie last two significant numbers should be there.
root@server # hour=`date | awk {'print $4'} | cut... (3 Replies)
Discussion started by: anilcliff
3 Replies
8. Shell Programming and Scripting
hi,
I have a file with decimal/non-decimal values
$ cat b22
373 164 92 62 20 131 94 12 129 111 95 154 37 15 447 25 7.4 135 77 122 32 92 70 57 37 42 72 17 13 97 40 41 53 22 80 71 29 87 23 31 273 6.2 12K 43 44 45 22 11 7.7 13 18 173 36 20 18 13 56 67 104 53 5.4 241 19 13 3.8 38 14 31 329 16 155... (8 Replies)
Discussion started by: sam05121988
8 Replies
9. Shell Programming and Scripting
Hi,
I need a help with arithmetic calculations in my script. I have two variables: a=17; b=1712
I want to perform ($a/$b)*100 with two decimals in the result.
I tried with following:
res=$((100*a/b))
res=`echo "scale=2; $a / $b" | bc`
But I am not getting the decimal values.... (4 Replies)
Discussion started by: karumudi7
4 Replies
10. Shell Programming and Scripting
i am having a varialbe a , which is input to my file
i want to multiply this input with value .43, and assign it to variable b.
i tried it as below:
#!/bin/sh
a=$1
b=`expr $1\*0.43`
echo b=$b
error : expr: non-integer argument
Please tell me , how to do this.
Thanks (10 Replies)
Discussion started by: rishifrnds
10 Replies
ECHO(1) User Commands ECHO(1)
NAME
echo - display a line of text
SYNOPSIS
echo [SHORT-OPTION]... [STRING]...
echo LONG-OPTION
DESCRIPTION
Echo the STRING(s) to standard output.
-n do not output the trailing newline
-e enable interpretation of backslash escapes
-E disable interpretation of backslash escapes (default)
--help display this help and exit
--version
output version information and exit
If -e is in effect, the following sequences are recognized:
\ backslash
a alert (BEL)
backspace
c produce no further output
e escape
f form feed
new line
carriage return
horizontal tab
v vertical tab
NNN byte with octal value NNN (1 to 3 digits)
xHH byte with hexadecimal value HH (1 to 2 digits)
NOTE: your shell may have its own version of echo, which usually supersedes the version described here. Please refer to your shell's docu-
mentation for details about the options it supports.
AUTHOR
Written by Brian Fox and Chet Ramey.
REPORTING BUGS
Report echo bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report echo translation bugs to <http://translationproject.org/team/>
COPYRIGHT
Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
The full documentation for echo is maintained as a Texinfo manual. If the info and echo programs are properly installed at your site, the
command
info coreutils 'echo invocation'
should give you access to the complete manual.
GNU coreutils 8.5 February 2011 ECHO(1)