error- multiplying negative decimal values

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# 1  
Old 09-07-2011
Error error- multiplying negative decimal values

b=$(echo | awk '{ print $a*$pattern}')
echo $b

its not working even
ALso tried `expr $a \* $pattern`


Last edited by radoulov; 09-07-2011 at 06:51 AM.. Reason: Code tags!
# 2  
Old 09-07-2011
b=$(echo | awk '{ print $a*$pattern}')

b=$(echo "$a * $pattern" | bc)

# 3  
Old 09-07-2011
Originally Posted by itkamaraj
b=$(echo | awk '{ print $a*$pattern}')

b=$(echo "$a * $pattern" | bc)

bc is not register on my m/c,
any other clue?
# 4  
Old 09-07-2011
$ a=10.02
$ pattern=-11.01
$ echo $pattern + $a | bc
$ echo $pattern \* $a | bc

---------- Post updated at 03:17 PM ---------- Previous update was at 03:15 PM ----------

$ echo "10.02 -11.01" | nawk '{b=$1*$2; {print b}}'

This User Gave Thanks to jayan_jay For This Post:
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