Displaying an output in Ruby to 2 decimal places

Question

I want to display a price such that if the answer is 10.1 the ouput would be 10.10 and if the answer is 20, the output would be 20.00

I have gone through the forums and used so many examples but it still hasn't worked for me. The answer is for rails but I am working on Ruby.s= '%2f' % @price and the output I get is 12.100000

You copied the example incorrectly. Should be `'%.2f'`, not `'%2f'` — Sergio Tulentsev, Sep 14 '15 at 10:44
Also, instead of scouring the internet indefinitely for a working snippet, you could have just read the documentation: http://ruby-doc.org/core-2.2.0/String.html#method-i-25 — Sergio Tulentsev, Sep 14 '15 at 10:45

ndnenkov · Accepted Answer · 2015-09-14T10:50:32.610

4

You have to add a dot in the format to say you want the 2 to be the precision after the decimal dot:

s = '%.2f' % @price

edited Sep 14 '15 at 10:50

answered Sep 14 '15 at 10:45

ndnenkov

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score 2 · Answer 2 · answered Sep 14 '15 at 11:32

2

You could also use the round method, so:

12.100000.round(2) => 12.10

answered Sep 14 '15 at 11:32

Jorge Lopez Jr

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Displaying an output in Ruby to 2 decimal places

2 Answers2