LinuxQuestions.org - Adding non-integer numbers stored in variables as strings

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jeriryan

06-30-2008 03:51 PM

Adding non-integer numbers stored in variables as strings

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 (Post 3199638)

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

Au contraire---this works only with integers.

pokemaster

07-01-2008 05:16 AM

I stand corrected :)

Sorry about that

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