Re: [opensuse] Command line calculator?

On Friday 29 June 2007 12:58, G T Smith wrote:
Adam Jimerson wrote:
Does anyone know if there is a program for a command line
calculator, and if so what it is called?

bash :-)

try

echo $((5+2))
echo $((7*6))

Or, try these:

% echo $(( 5.5 + 2.2 ))
bash: 5.5 + 2.2: syntax error in expression (error token is ".5 + 2.2 ")

% echo $(( 010 * 020 ))
128

% echo $(( 080 + 020 ))
bash: 080: value too great for base (error token is "080")

% echo $(( 0xa * 0xa ))
100


at CLI

of course if you want trig and logs you need do a little work...


It only does integers and has an inflexible way of treating numeric
radixes (e.g., leading zero forces octal), as shown above.

Dc (RPN) or bc (infix) are the way to go for non-trivial scripted
calculation. They do floating point, arbitrary precision and have
formatted printing. (BASH has this, too, perhaps even better, being
modelled after the C library printf() function.)


Randall Schulz
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