How to multiple decimals in linux

3junior · #1 (**permalink**) 04-03-2009

How to multiple decimals in Linux?
When I do it like this i get an error message

echo "$((1 * 1.1))"
-bash: 1 * 1.1: syntax error in expression (error token is ".1")

Corona688 · #2 (**permalink**) 04-03-2009

The bash shell does not support floating point numbers, but you can use the bc tool like this:

Code:

$echo '2 * 3.5' | bc
7.0
$

3junior · #3 (**permalink**) 04-03-2009

bc doesn't like variables another way

danmero · #4 (**permalink**) 04-04-2009

Code:

a=2
b=3.5
echo "$a * $b" | bc
7.0

vidyadhar85 · #5 (**permalink**) 04-04-2009

you can do like this also

Code:

awk 'BEGIN{print .9*.9}'

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