Hi,
I think you're missing the fact that the subtruct variable is not
initialized and defaults to 0.
So, what you get is
0 - 34523 - 9485 - 394 - 3456 = -47858
not
34523 - 9485 - 394 - 3456 = 21188
Cheers,
Daniele
igor denisov wrote:
> Hello there.
>
> There is a problem here.
>
> input:
> 34523
> 9485
> 394
> 3456
>
> awk '{subtruct-=$1} END {print subtruct}' input
>
> output:
> -47858
> same thing but without minus with
>
> awk '{sum+=$1} END {print sum}' input
>
> output:
> 47858
>
> Why in both cases the code sums the field?
> --
> igor denisov.
