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Complex calulation in shell script

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# 1  
Old 07-15-2013
Complex calulation in shell script
Hi ,

I need one help to do some complex calculation in shell script.
here is what i need to do:-
a=2
b=2
c=2
d=2
result=a+(b/(20*c))+(c/(10*d))

is there any thing special there so that i can group intermdiate results.

Please help me if you have any idea.
Last edited by harpal singh; 07-15-2013 at 04:32 AM..
# 2  
Old 07-15-2013
You have to use bc command and also during variable interpolation use $before variable name.

Code:
 
echo "$a+($b/20*$c)+($c/10*$d)" | bc

This User Gave Thanks to millan For This Post:
harpal singh
# 3  
Old 07-15-2013
You may try

Code:
result=$(((a+(b/20*c)+(c/10*d))))

If you have a specific need to group the intermediate results, you may follow the same logic to calculate the intermediate results.

If you need accuracy to the decimal precision, then use awk with printf.
This User Gave Thanks to krishmaths For This Post:
harpal singh
# 4  
Old 07-15-2013
Quote:
Originally Posted by millan
You have to use bc command and also during variable interpolation use $before variable name.

Code:
 
echo "$a+($b/20*$c)+($c/10*$d)" | bc


Thanks a lot ..it worked SmilieSmilie
# 5  
Old 07-15-2013
If you are using a 1993 or later version of the Korn shell and need a floating point result, you could also use:
Code:
result=$((a+(b*1.0/(20*c))+(c*1.0/(10*d))))
echo $result

to produces:
Code:
2.15

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