How do you round a float to 2 decimal places in JRuby?

Question

How do you round a float to 2 decimal places in JRuby(1.6.x)?

number = 1.1164
number.round(2)

# The above shows the following error
# wrong number of arguments (1 for 0)

Answer 1

(5.65235534).round(2)
#=> 5.65