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error while doing decimal comparision in shell

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# 1  
Old 11-12-2008
error while doing decimal comparision in shell
a=10
b=10.6
c=$(echo "$a - $b" | bc)
if [[ "$c" -ge 0 ]]
echo "success"
else
echo "failure"
fi


while executing the above sample code, am getting the below error:

[[: -.6: syntax error: operand expected (error token is ".6")


seems unix is comparing .6 with 0 instead of 0.6 with 0.

can anyone help me in solving this ?

regards,
Chandra
# 2  
Old 11-12-2008
you are missing a "then"

if [[ "$c" -ge 0 ]]
then
....


and put

#!/usr/bin/ksh

on the top of it, your synthax is not working in sh or bash, because with -ge they suppose integer values

Code:
#!/usr/bin/ksh
a=10
b=10.6
c=$(echo "$a - $b" | bc)
if [[ "$c" -ge 0 ]]
then
echo "success"
else
echo "failure"
fi

# 3  
Old 11-12-2008
my mistake....am using "then"......forgot to type that.

a=10
b=10.6
c=$(echo "$a - $b" | bc)
if [[ "$c" -ge 0 ]] ; then
echo "success"
else
echo "failure"
fi
# 4  
Old 11-12-2008
and still am getting the same old error....as mentioned in mi first post.
# 5  
Old 11-12-2008
have you tried it with ksh as I mentioned?
# 6  
Old 11-12-2008
You can try it in Ksh and sh.

It will work when adding "then" in your first post script.

Try this
# 7  
Old 11-12-2008
Need some variable values
Can you get me the value for two variables in your server. So that it's easier to identify the issue.

cat /usr/include/sys/limits.h

and get me the value for

BC_BASE_MAX

BC_SCALE_MAX
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