Question

I would like to format a string containing float variables including them with a fixed amount of decimals, and I would like to do it with this kind of formatting syntax:

amount = Math::PI
puts "Current amount: #{amount}"

and I would like to obtain Current amount: 3.14.

I know I can do it with

amount = Math::PI
puts "Current amount %.2f" % [amount]

but I am asking if it is possible to do it in the #{} way.

Answer 1

Use round:

"Current amount: #{amount.round(2)}"