Hi,

I have a sh script which contains the following line

TOTAL=$((e4-s4)) -> Where e4 and s4 are input got from the user.

At the time of execution of this line the following error occurs

test.sh: syntax error at line 8: `TOTAL=$' unexpected


How to solve this issue?. Can any one help me please?.........................



Regards
Revathi

We need to see the rest of the script to tell why that statement was unexpected.

I don't know the $((...)) syntax, but it could be from a more exotice shell and not recognised by the Bourne shell.
This should work (for integer arithmetic):
let total=e4-s4

The following is more portable:

TOTAL=`expr $e4 - $s4`

From the syntax $((expression)) it looks like your script was probably written to take advantage of
specific features in the bash shell. As a result your shell script will not be very portable to
non-Linux/GNU systems unless bash is available on these systems.

Below is my script

#!/bin/bash
echo "Enter the start IP"
IFS="."
read s1 s2 s3 s4
echo "Enter the End IP"
IFS="."
read e1 e2 e3 e4
TOTAL=$(($e4 - $s4))
echo "Total is $TOTAL"


Any idea

You suggestion does not work.
Below is my script

#!/bin/bash
echo "Enter the start IP"
IFS="."
read s1 s2 s3 s4
echo "Enter the End IP"
IFS="."
read e1 e2 e3 e4
TOTAL=$(($e4 - $s4))
echo "Total is $TOTAL"

Any idea

You suggestion does not work.
Below is my script

#!/bin/bash
echo "Enter the start IP"
IFS="."
read s1 s2 s3 s4
echo "Enter the End IP"
IFS="."
read e1 e2 e3 e4
TOTAL=$(($e4 - $s4))
echo "Total is $TOTAL"

Any idea