topic Re: BASIC CALCULATION THRU Korn Shell in Operating System - HP-UX

BASIC CALCULATION THRU Korn Shell

KAMARULZAMAN HJ ALI — Fri, 04 Jul 2003 10:32:26 GMT

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

Re: BASIC CALCULATION THRU Korn Shell

Darren Prior — Fri, 04 Jul 2003 10:41:08 GMT

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.

Re: BASIC CALCULATION THRU Korn Shell

melvyn burnard — Fri, 04 Jul 2003 10:43:09 GMT

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

Re: BASIC CALCULATION THRU Korn Shell

Tim D Fulford — Fri, 04 Jul 2003 11:16:35 GMT

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

Re: BASIC CALCULATION THRU Korn Shell

Dagmar Boelen — Fri, 04 Jul 2003 11:32:35 GMT

Hi,

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

Re: BASIC CALCULATION THRU Korn Shell

RAC_1 — Fri, 04 Jul 2003 11:51:00 GMT

I do it his way.

echo "1*2.33"|bc

Re: BASIC CALCULATION THRU Korn Shell

KAMARULZAMAN HJ ALI — Fri, 04 Jul 2003 12:47:18 GMT

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

Have a nice day...

Re: BASIC CALCULATION THRU Korn Shell

Leif Halvarsson_2 — Fri, 04 Jul 2003 13:58:05 GMT

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.