BASIC CALCULATION THRU Korn Shell

[KAMARULZAMAN HJ ALI]

Dear All!!

Need your help to perform simple calculation thru korn shell.

e.g #1
A=3
let B=$A*2
6
Rem = I got it and correct
e.g #2
A=3
let B=$A*1.33
3
Rem = The answer is 3 not 3.99,
Please assist me on how could I get 3.99

TQVM

[Darren Prior · Accepted solution]

Hi,

I'm afraid that ksh can only provide integer arithmetic - see man ksh. How about using something like bc or dc? There are man pages with examples of how to use them.

regards,

Darren.

[melvyn burnard]

As you said in hte subject line, this is a BASIC calculation, and ksh can only handle integers.

[Tim D Fulford]

try

a=1.33
b=2
ans=$(echo $a $b | awk '{printf"%4.2f\n",$1*$2}')
echo $ans

You can format your output with the printf statement, alternatively just use {print $1*$2} & see waht format you get!

Tim

[Dagmar Boelen]

Hi,

You can try awk. awk is capable of handling the calculation you mentioned.

[RAC_1]

I do it his way.

echo "1*2.33"|bc

[KAMARULZAMAN HJ ALI]

Thanks A LOT for your help. I really apprecited it.

Have a nice day...

[Leif Halvarsson_2]

Hi,
Sorry for this late answere. It is perhaps forgotten that it is possible to do simple "floating point" calculations with integer arithmetic. It was nessecary with old system which have no floating point support at all. Try the following (3* 1.33):

echo $((3*133/100)).$((3*133%100))

% is the "mod" operator, the rest in a integer division.