Adding non-integer numbers stored in variables as strings

jeriryan · 06-30-2008, 03:51 PM

I've been trying my hand at a bash script. If I have two variables, bob and betty, and inside bob is the string "1.55", and betty stores the string "2.40", for instance, how can I add them together and store that result in steve?

pokemaster · 06-30-2008, 04:26 PM

steve=$(( $bob + $betty ))

Kenhelm · 06-30-2008, 08:32 PM

For non-integer calculations in Bash you can use bc or dc:-

Code:

steve=$(echo $bob + $betty | bc)
# or
steve=$(dc -e "$bob $betty + p")

pixellany · 06-30-2008, 10:50 PM

Quote:

Originally Posted by pokemaster

steve=$(( $bob + $betty ))

Au contraire---this works only with integers.

pokemaster · 07-01-2008, 05:16 AM

I stand corrected

Sorry about that