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Bash If Syntax Error Operand Expected

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The correct thing to write would be: if [[ "$op" == "q" ]]; then Double parenthesis are used for arithmetic not boolean expressions. more hot questions question feed lang-sh about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation i mean at first run (k=0) it will increment array once, and at second run (k=1) it will increment the array again.. –teutara Dec 2 '12 at 18:49 1 All Is my workplace warning for texting my boss's private phone at night justified? http://waspsoft.com/syntax-error/bash-syntax-error-operand-expected.html

Instead prefer $(). In summary: The original problem related to an unmatched ` in a backquote expression (and more generally, how to close a backquote expression and how newlines inside backquote expressions are handled What does an 'ü' mean? It appears your intent is to escape the * character so it is not treated specially by the shell before being subjected to arithmetic expansion.

Bash Syntax Error Operand Expected Error Token Is

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 In a GNU C macro envSet(name), what does (void) "" name mean? Which requires more energy: walking 1 km or cycling 1 km at the same speed? Can Customs make me go back to return my electronic equipment or is it a scam?

Since it is a command, command substitution is needed. asked 1 year ago viewed 3656 times active 1 year ago Related 2pgModeler installation - Dependencies error5Configuration error: Iberty library not found0Strange bash sytax error depending on sudo usage0Trying to install Unix & Linux Stack Exchange works best with JavaScript enabled UbuntuCommunityAsk!DeveloperDesignDiscourseHardwareInsightsJujuShopMore ›AppsHelpForumLaunchpadMAASCanonical current community chat Ask Ubuntu Ask Ubuntu Meta your communities Sign up or log in to customize your list. Expr: Syntax Error What does Sauron need with mithril?

To check if the input is a positive integer (only unsigned digits) you can use this awesome bash regex: [[ "$number" =~ ^[0-9]+$ ]] that checks if $numbercontains only digits. Bash (error Token Is ") Hot Network Questions Is the standard Canon 18-55 lens the same as 5 years ago? asked 4 years ago viewed 869 times active 4 years ago Related 2882Can a Bash script tell which directory it is stored in?1049String contains in Bash728How can I redirect and append Force Microsoft Word to NEVER auto-capitalize the name of my company How to handle spending money for extended trip to Europe?

Is there a way to make a metal sword resistant to lava? Integer Expression Expected GTIN validation Does mean=mode imply a symmetric distribution? Then what you intended as the contents of the second backquote expression it sees outside of backquotes, and sees the following as a second backquote expression: ` done echo "The factorial Thankyou.

Bash (error Token Is ")

Replace the for loop with for i in "${directories[@]}"; do - add double quotes. What type of sequences are escape sequences starting with "\033]" How does the pilot control the Dassault Rafale? Bash Syntax Error Operand Expected Error Token Is We are forbidden from using find, locate, du or any recursive commands (e.g. Syntax Error In Expression Error Token Is SYNOPSIS bc bc EXPRESSION Here are some examples: $ bc bc 1.06 Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.

To keep with script programming paradigm and allow for better math support, languages such Perl or Python would be better suited when math is desired. weblink How to make different social classes look quite different? Browse other questions tagged linux bash syntax-error hierarchy operand or ask your own question. See below for details. Invalid Arithmetic Operator (error Token Is

Why does Windows show "This device can perform faster" notification if I connect it clumsily? How does the pilot control the Dassault Rafale? That's how I worked before, with (( and )) and it worked just fine –FinalDestiny Mar 27 '12 at 0:07 @FinalDestiny (( and )) are for mathematical operations. navigate here Limit involving exponentials and arctangent without L'Hôpital How could banks with multiple branches work in a world without quick communication?

In a GNU C macro envSet(name), what does (void) "" name mean? Bash Let Is 8:00 AM an unreasonable time to meet with my graduate students and post-doc? Also, you never assign anything to a1 or a2. –Doorknob Nov 15 '15 at 16:04 Please fix any errors suggested by shellcheck.net before continuing. –chepner Nov 15 '15 at

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This is because each number and arithmetic operator must be passed as a separate command-line argument to expr: [email protected]:~$ expr 1+1 1+1 [email protected]:~$ expr 1 + 1 2 To fix this Meaning of "soul-sapping" Is there a way to make a metal sword resistant to lava? share|improve this answer answered May 30 '14 at 18:52 Tripp Kinetics 2,5401023 Not sure what you mean by evaluate the $BACKUP_DRIVE parameter as a math expression, but it is Unary Operator Expected In interactive mode, type cntrl-d (EOF) to exit.

Why? Instead, as others have said, simply add the missing backquote where it was supposed to be. Force Microsoft Word to NEVER auto-capitalize the name of my company GTIN validation When taking passengers, what should I do to prepare them? his comment is here ls -R).

Is this safe to display MySQL query error in webpage if something went wrong? This is because you can actually have newlines (i.e., line breaks) inside a backquote expression: [email protected]:~$ file `which vim > ` /usr/bin/vim: symbolic link to `/etc/alternatives/vim' So what's happening is that They all relate to command-line syntax, most for bash, but in one case for the separate expr utility. Bang! –gniourf_gniourf Dec 2 '12 at 18:50 | show 1 more comment up vote 1 down vote A bit bandaid-y, but you rewrite your for-loop into a while loop: l="${hitStart[k]}" while

How's the CMD trip bonuses from extra legs work? Does mean=mode imply a symmetric distribution? How to pluralize "State of the Union" without an additional noun? more hot questions question feed lang-sh about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

Problem? Adopt A Jet/Book Modern soldiers carry axes instead of combat knives. Not the answer you're looking for? The solution is not to put a backquote at the very end of the script, of course!

Should indoor ripened tomatoes be used for sauce? linux bash shell share|improve this question edited May 30 '14 at 19:30 Andrew Medico 15.8k83663 asked May 30 '14 at 18:47 john wilson 4118 why are you using /bin/sh Why doesn't the expr utility know 1+1 is supposed to be interpreted as an integer, the sum of 1 and 1? With Bash and Korn shell, it is generally not needed.

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