Question

I want to round a BigDecimal in ruby. I know I can use the round function but

the round function gives

(3.2).round(2) =>  3.2

I want

(3.2).round(2) =>  3.20
(3.20).round(2) =>  3.20
(3).round(2) =>  3.00
(3.578).round(2) =>  3.58

I always want to have 2 decimal places, 3.20 not 3.2

any idea how to get this done ?

Answer 1

try this:

'%.2f' % 3.2
=> "3.20"

'%.2f' % 3
=> "3.00"

'%.2f' % 3.578
=> "3.58"

etc.