Saturday, July 19, 2008

Command Line Calculator!

To do small calculations without starting your calculator utility here is a small trick. Suppose you want to multiply 2 and 3, do this -

$ echo $[2*3]

However if you wanted to divide 2 by 3

$ echo $[2/3]

would give a '0'.

We can still make use of the command line to get the correct answer. We have to use 'bc'. Like this -

$ echo '2 / 3' | bc -l

Here is the output -

.66666666666666666666

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