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floating point arithmetic operation error

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# 1  
Old 07-12-2012
floating point arithmetic operation error

I am writing a script in zsh shell, it fetchs a number from a file using the awk command, store it as a variable, which in my case is a small number 0.62000. I want to change this number by multiplying it by 1000 to become 620.0 using the command in the script


trouble is when the script is run it returns the error message

0.62000: syntax error: invalid arithmetic operator (error taken is ".62000")

I have also tried the following variations, but none of them works

var2=$var1*1000 | dc

Could someone tell me what is wrong?

# 2  
Old 07-12-2012
newvar=$( echo "$var * 3.11" | bc -l )
echo $newvar

# 3  
Old 07-12-2012
Thanks it works!

I tried to specify only one decimal space with the comand
newvar=$( echo "scale=1; $var * 1000" | bc -l )

but it doesn't seem to work, do you know why?


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