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Shell Programming and Scripting

Arithmetic calculations in bash file

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# 8  
Old 03-03-2013
Quote:
Originally Posted by kristinu
Aney idea what's the problem with this?

Code:
awk -v a=0.569000006 -v b=0.369000018 -v c=5.0 '{res= (a-b)/c; print res;}'

This line of code will be run once for every line of input given to awk. Since there are no input lines, the code isn't run. However:

Code:
awk -v a=0.569000006 -v b=0.369000018 -v c=5.0 'BEGIN{res= (a-b)/c; print res;}'

or
Code:
awk -v a=0.569000006 -v b=0.369000018 -v c=5.0 'END{res= (a-b)/c; print res;}'

should work for you.
# 9  
Old 03-04-2013
And you can do the calculation directly in the print
Code:
awk -v a=0.569000006 -v b=0.369000018 -v c=5.0 'BEGIN {print (a-b)/c}'
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