Question

in my ksh script I need to calculate only integer numbers

Sometimes I get float numbers such as 3.49 or 4.8…etc

so I need to translate the float numbers to integer’s numbers according to the following rules (examples)

3.49     will be 3
2.9      will be 3
4.1      will be 4
23.51    will be 24
982.4999 will be 982

10.5     will be 11  ( this example if float is .5 then it will roundup )

Please advice how to do this in ksh or awk or perl

Or

any other language that can be run in my ksh script

Answer 1

After a brief google session, I found that printf seems to be able to do the job, at least in bash (couldn’t find an online interpreter that does ksh).

printf "%0.f\n" 4.51
5
printf "%0.f\n" 4.49
4

Code at: http://ideone.com/nEFYF

Note: perl might be overkill, like Marius says, but here’s a perl way:

The perl module Math::Round seems to handle the job.

One-liner:

perl -MMath::Round -we 'print round $ARGV[0]' 12.49

Script:

use v5.10;
use Math::Round;
my @list = (3.49, 2.9, 4.1, 23.51, 982.4999);

say round $_ for @list;

Script output:

3
3
4
24
982