Shell Programming and Scripting

Hi Guru's

i have a file which contains data as below(file.txt) and an inital value 8725

403
352
462
359
317
347
414
285
308
350
300
305
381
319
373
358
329
318
360
313
338
779
368

how would i read each value in a file and subtract it from the inital value?

i tried using below format, But it failed with syntax error.

Code:

state3=8725
while read $ct 
do
TOTAL=`expr $state3 - $ct`
echo $TOTAL
done < file.txt

Please advice how to achieve this?

can u tell us what error u r getting??

here's the error

expr: syntax error
expr: syntax error
expr: syntax error
expr: syntax error
expr: syntax error
expr: syntax error
expr: syntax error
expr: syntax error
expr: syntax error
expr: syntax error
expr: syntax error
expr: syntax error

Also use code tags when posting error logs, example data, code snippets, thanks. Indention of code can also be useful.

Remove the $:

Code:

while read ct

change the below line and execute...

Code:

while read ct

its not $ct

Opps!! Thanks guys works now

---------- Post updated at 09:01 PM ---------- Previous update was at 08:06 PM ----------

One more update to it.

the output should be in format

Code:

$state3 - $(addition of all number's in file.txt)

the current code captures one value of file.txt and subtracts.

Code:

# perl -le '$x=0;$state3=8725;open I,"<input";while(<I>){$x+=$_} print $state3-$x;close I'
287