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Unix Script Expr Syntax Error


What is way to eat rice with hands in front of westerners such that it doesn't appear to be yucky? SYNOPSIS bc bc EXPRESSION Here are some examples: $ bc bc 1.06 Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc. That is, you must have blank space before the trailing ] as well as after the leading [. substr STRING POS LENGTH substring of STRING, POS counted from 1. have a peek here

Not the answer you're looking for? How do I do it? The : syntax works on my OSX 10.9.4 machine (which has bash 3.2.51, not very current): echo `expr "$stringZ" : 'abc[A-Z]*.2'` share|improve this answer answered Aug 30 '14 at 23:08 Wm Exit status is 0 if EXPRESSION is neither null nor 0, 1 if EXPRESSION is null or 0, 2 if EXPRESSION is syntactically invalid, and 3 if an error occurred. http://unix.stackexchange.com/questions/3648/why-am-i-getting-a-syntax-error-with-my-shell-arithmetic

Expr Syntax Error Multiplication

anyway... why? What object can prove the equations? And use indentation. –muru Apr 9 '15 at 16:02 2 I'm voting to close this question as off-topic because problems due to typos are hardly useful. –muru Apr 9 '15

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If we define a variable named count, setting it to zero: count=0 ...we can output the value of that variable with the echo command: echo $count 0 ...now we can increment Here, the result is: 1 expr 5 \> 10 Here, the result is 1 (true) if 5 is less than 10, otherwise the result is 0. Why does removing Iceweasel nuke GNOME? Expr Syntax Error Mac In interactive mode, type cntrl-d (EOF) to exit.

Introduction to Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started bash has a amazing arithmetic expansion share|improve this answer edited Apr 9 '15 at 17:51 answered Apr 9 '15 at 16:25 Helio 2,73931640 I have updated the new script. Assuming that you want to process file-by-file: Code: ls -1 ${common_path_in}/$i/*.csv | while read filename do tot_rec_count=`wc -l "${filename}" | cut -f1 -d' '` The Following User Says http://stackoverflow.com/questions/30497074/i-am-getting-expr-syntax-errors-in-bash-shell-for-a-simple-program Every polynomial with real coefficients is the sum of cubes of three polynomials Player claims their wizard character knows everything (from books).

length STRING length of STRING. + TOKEN interpret TOKEN as a string, even if it is a keyword like 'match' or an operator like '/'. ( EXPRESSION ) value of EXPRESSION. Expr Syntax Error In Ksh Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. You should also mention the shell you're using (usually bash). How to select citizen justices?

Expr Syntax Error Bash

Is there a word for "timeless" that doesn't imply the passage of time? try here Not the answer you're looking for? Expr Syntax Error Multiplication How to create a torus with divided cuts that correspond to the direction of the torus Development of retrosynthesis plan Why do the Sparkfun and Adafruit Eagle libraries use smaller footprints Expr Syntax Error In Unix Shell Script making new symbol from two symbols Dealing with a nasty recruiter Player claims their wizard character knows everything (from books).

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Browse other questions tagged bash expr or ask your own question. expr became popular in the days of the Bourne Shell, which did not support math. 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 Check This Out Success!

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echo "${filename}" I have got into the habit of always putting quotes round string variables and strings because it prevents so many silly errors when a value contains spaces. Join them; it only takes a minute: Sign up Syntax error expr up vote 2 down vote favorite Why does the following returning a syntax error: stringZ=abcABC123ABCabc echo `expr match "$stringZ" asked 6 years ago viewed 5690 times active 5 years ago Related 6What is the syntax of a complex condition in shell?2Why do I get error “Could not chdir to home Expr Match Syntax Error use of back quote in value assignment to a variable and with expr command.

How to fix a bent lens mount hook? index STRING CHARS index in STRING where any CHARS is found, or 0. ARG1 = ARG2 ARG1 is equal to ARG2. http://crimsonskysoftware.com/syntax-error/unix-expr-substr-syntax-error.html AWS EC2 SSH from my IP address which has changed Can the editor of a book add citations of individual chapters to his own citation count?

The following example illustrates that a declared integer is not treated as a string. $ n=6/3 $ echo $n 6/3 $ declare -i n $ n=6/3 $ echo $n 2 When My 21-year-old adult son hates me Given that ice is less dense than water, why doesn't it sit completely atop water (rather than slightly submerged)? Join them; it only takes a minute: Sign up I am getting expr syntax errors in bash shell for a simple program up vote 1 down vote favorite #!/bin/bash clear echo However, it is possible to do math with shell script.

ARG1 % ARG2 arithmetic remainder of ARG1 divided by ARG2. Why were Navajo code talkers used during WW2? 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