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Full Discussion: Syntax error in subtraction in Bash
Top Forums Shell Programming and Scripting Syntax error in subtraction in Bash Post 303040005 by ngabrani on Monday 21st of October 2019 12:50:50 PM
Old 10-21-2019
Syntax error in subtraction in Bash
I am sharing a code snippet.
Code:
for (( i=0; i<=$(( $count -1 )); i++ ))
do

	first=${barr2[$i]}
	search=${barr1[$i]}
        echo $first
	echo "loop begins"
	for (( j=0; j<=5000; j++ ))
	do
		if [[ ${harr1[j]} == $search ]]; then
			echo $j
			break;
		fi

	done
	second=${harr2[$j]}	
	echo $second
	
	diff=$((second-first))
	echo "diff" 
	echo $diff
done

I am getting a syntax error in line of subtraction that says something like:
syntax error: invalid arithmetic operator (error token is ".0985146")

This is the line that gives error.
Code:
	diff=$((second-first))

Appreciate your help.
 

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LEARN ABOUT MOJAVE

smbdiagnose

SMBDIAGNOSE(8)						    BSD System Manager's Manual 					    SMBDIAGNOSE(8)

NAME

     smbdiagnose -- gather information to aid in diagnosing SMB file sharing issues

SYNOPSIS

     smbdiagnose -h
     smbdiagnose [-f path] [-s]

DESCRIPTION

     The smbdiagnose tool gathers system information and network traffic in order to assist Apple when investigating issues related to SMB file
     sharing.  A great deal of information is harvested, spanning system state, system configuration, and network traffic related to SMB file
     sharing.

   What smbdiagnose Collects:
	   o   A network packet trace of SMB file sharing traffic that occurs during the time the tool is run.	This packet trace may include file
	       names and file data.  It may also include the authentication exchange used to log into the SMB server.
	   o   Enhanced debug logs for the SMB server process.
	   o   If the -s option is specified, the default set of information collected by sysdiagnose(1).

   What smbdiagnose Doesn't Collect:
	   o   No authentication credentials are harvested from the system

OPTIONS

     -h      Print full usage.
     -f path Write the diagnostic to the specified path.  The default is ``~/Desktop''.
     -s      Collect sysdiagnose(1) information.  The default is not to collect sysdiagnose(1) information.

EXIT STATUS

     smbdiagnose exits with status 0 if there were no internal errors encountered during the diagnostic, or >0 when an error unrelated to external
     state occurs or unusable input is provided by the user.

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