bc command


 
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# 1  
Old 07-30-2001
Tools bc command

I need to understand the bc command in UNIX. Can someone help me on this one.Smilie
# 2  
Old 07-30-2001
Calculator

Did you try to use the man page already? bc is a nifty mathematics program that usually serves as a UNIX desktop calculator:

Quote:
$ bc
7 * 9
63
quit
# 3  
Old 07-30-2001
hi, yes I did, but i need that inside a script....this is the problem...and also, if you use a number with a decimal for example 198.7 and 78.5 in a script, how do u use the bc command to use "scale = 3", because in a script you can spesify it as follows :

TOT=` 198.7 / 78.5 | bc`

It will devide the 198 and 78, but throw away the .7 and .5

On command line you can do it :
$bc
scale = 3
198.7 / 78.5
2.531
quit
$
# 4  
Old 07-30-2001
Minor tweak

Try using:

TOT=$(echo "scale=3; 198.7/78.5")
echo $TOT
2.531

# 5  
Old 07-30-2001
thanks, but not working,

TOT=$(echo "scale=3; 198.7/78.5")
echo $TOT
scale=3; 198.7/78.5

sorry
# 6  
Old 07-30-2001
Power bc out

Of course I forgot the bc ...

TOT=$(echo "scale=3; 198.7/78.5" | bc)
echo $TOT
2.531

# 7  
Old 07-30-2001
thanks, this is working....will post a qeustion again soon...thanks againSmilie
 
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