Re: bash script problems

[William Park]

On Thu, May 12, 2005 at 02:32:42AM +1000, Tony Jo wrote:
> Hello, I am having issues with a bash script and I was wondering if
> anyone could be of assistance? Its just that our lecturer assumed it
> would be easy to pick up and do an assignment on, even though we
> haven't learnt it and its not a pre-requisite.
> 
> But anyway, I noticed when I use the cut command to obtain some
> numbers from a file, I cannot use it in an arithmetic operation. I
> tried the following: temp='expr $val1 + $val2' But I get the following
> error message: expr: non-numeric argument
> 
> I was wondering if BASH requires type conversion? I even printed out
> the values for $val1 and $val2. They look like integers to me. If
> anyone could help me, it would be greatly appreciated.
> 
> Thanks in advance

Note the difference between `...` and '...'

-- 
William Park <opengeometry@yahoo.ca>, Toronto, Canada
ThinFlash: Linux thin-client on USB key (flash) drive
     http://home.eol.ca/~parkw/thinflash.html