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Bash Arithmetic Syntax Error

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more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed For details type `warranty'. 3 + 2 5 obase=2 12 1100 Remember to type cntrl-d (EOF) to exit from interactive mode. $r=3.5 $s=`echo "$r + 2.2" | bc` $echo $s If you know you have gnu dc available the more concise a=`dc -e "$precision k $var1 $var2 * $var3 /p"` can be used. How would family relationships change if legal system uses collective punishment? Check This Out

asked 1 year ago viewed 2012 times active 1 month ago Related 0why syntax error near unexpected token ' fi '1“syntax error: unexpected end of file” simple script0How do I solve However, in some cases you know the value consists of many words and you want to split them, as in this example where you wouldn't quote for pid in $PID if Well, it seems like it wasn't set the first time. Is 8:00 AM an unreasonable time to meet with my graduate students and post-doc?

Bash Syntax Error Invalid Arithmetic Operator

Last edited by crts; 08-14-2011 at 08:40 PM. My book does not cover this well at all. –Andrew M Mar 30 at 3:41 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign Created using Sphinx 1.4.4. I'm having hard time de-crypting what you put in this comment. –alex Nov 1 '10 at 10:10 4 @3sdmx: just don't bother with expr, use the shell arithmetic $((…)) instead.

MTK358 View Public Profile View LQ Blog View Review Entries View HCL Entries Find More Posts by MTK358 View Blog 08-14-2011, 08:32 PM #13 crts Senior Member Registered: Jan Please explain the local library system in London, England How does the pilot control the Dassault Rafale? May I ask for any advice from you experts? Bash Syntax Error Near Unexpected Token Else' What is the sh -c command?

The line if [ "$num" -ge 0]; then should thus be rewritten to say: if [ "$num" -ge 0 ]; then For more details on [ syntax, see the output of Not the answer you're looking for? As you can see, it is also a little picky about spaces, but it wants the opposite of what expr wanted. Thank you.

As you can see, it is picky about spaces. $ z=5 $ z=`expr $z+1` ---- Need spaces around + sign. $ echo $z 5+1 $ z=`expr $z + 1` $ echo Bash Syntax Error Near Unexpected Token Fi' up vote 4 down vote favorite I have a problem with a linux shell script (sh). Quote: Originally Posted by makyo you should try removing the "$" from the first part of the "for" statement -- i.e. "$i=" should be "i=" -- after some reflection, I think As an aside, it's helpful to see what's going on as your script runs.

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  8. share|improve this answer edited Feb 24 at 1:31 answered Feb 24 at 1:25 Thomas Dickey 32.5k34083 1 ...

Arithmetic Syntax Error In Shell Script

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed This site is not affiliated with Linus Torvalds or The Open Group in any way. Bash Syntax Error Invalid Arithmetic Operator Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Ksh Arithmetic Syntax Error Do you think my solution will solve the problem?

MTK358 View Public Profile View LQ Blog View Review Entries View HCL Entries Find More Posts by MTK358 View Blog 08-14-2011, 03:17 PM #7 crts Senior Member Registered: Jan his comment is here Finding a file starting with '-' dash My girlfriend has mentioned disowning her 14 y/o transgender daughter Is this safe to display MySQL query error in webpage if something went wrong? Having a problem logging in? How to pluralize "State of the Union" without an additional noun? Bash Syntax Error Near Unexpected Token Done'

Thank You. Why does bash think the file ends too soon, rather than the line? Code: $ var= $ if (( $var >= (3 + 5) ));then echo true;else echo false;fi bash: ((: >= (3 + 5) : syntax error: operand expected (error token is ">= http://sovidi.com/syntax-error/bash-if-syntax-error.php Is there a good way to get from Levoča to Lviv?

In this technique I used this: a=`expr $var1 \* $var2 / $var3` This is giving errors, and apperently, I can't do this: a=`expr ($var1 \* $var2) / $var3` because this gives Bash Syntax Error Near Unexpected Token Then' Note As we will see, some of the commands used to facilitate math are a little picky about things like spaces around operators. what is the difference between \twocolumn and \documentclass[twocolumn]{book} Is my workplace warning for texting my boss's private phone at night justified?

The backslash retains its special meaning only when followed by one of the following characters: $, `, ", \, or .

Careful, though, if you export COLUMNS AND set the variables to a wrong value inside your script then 'tput' will also report wrong values. Video displays in Star Wars Will the medium be able to last 100 years? UPDATE: The reason for not using is mostly because they are easier to miss. –tusharkant15 Apr 9 '15 at 16:37 | show 9 more comments 4 Answers 4 active oldest votes Bash Syntax Error Near Unexpected Token Do' Maybe you can Code: grep 'COLUMNS' all the scripts and check each line for errors.

Why can a Gnome grapple a Goliath? Can you post the relevant code where COLUMNS is a assigned? How to pluralize "State of the Union" without an additional noun? http://sovidi.com/syntax-error/bash-while-loop-syntax-error.php But you have to treat the variables as strings.

How rich can one single time travelling person actually become? What does the "Phi" sign stand for in musical notation? NUM=$(wc -l "$text") and then I want to check whether NUM is odd or not. Although the strange formatting displayed in the output of some command-line utilities might convey the impression that what begins with ` ends with ', that is not the case. (I noticed

On THE other hand or on another hand? shell shell-script test share|improve this question edited Aug 5 '15 at 22:22 Gilles 369k666681119 asked Aug 5 '15 at 13:23 chhaya vishwakarma 210411 consider using bash's argument handling. How to pluralize "State of the Union" without an additional noun? My girlfriend has mentioned disowning her 14 y/o transgender daughter How does the pilot control the Dassault Rafale?

Those are shell built-ins. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the However, it is possible to do math with shell script. My girlfriend has mentioned disowning her 14 y/o transgender daughter Why can a Gnome grapple a Goliath?

Other syntax errors preventing your script from working properly relate to argument parsing in the [ construct and the expr command. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the The test man page is exactly what I was looking for. How could banks with multiple branches work in a world without quick communication?

I'll try to take the number only as you suggest! Can Customs make me go back to return my electronic equipment or is it a scam? How to pluralize "State of the Union" without an additional noun? The Woz Monitor What could cause the throttle to stick in my Ford Ranger?

If not, why? As it appears, you will have to export COLUMNS and LINES before you can use them in a script. If the error message had said the error was an end of line in the backquote substitution, you would probably have immediately recognized the problem (provided you know that ` is thank you –Francis Feb 15 at 23:17 am I supposed to double quote only the $PID in the if [[ $PSPID -eq $PID ]] ?