Trusted answers to developer questions
How to round float value to the nearest n decimal places in Ruby
okwudili onyejiaku
Overview
The round() method can be used to round a number to a specified number of decimal places in Ruby. We can use it without a parameter (round()) or with a parameter (round(n)).
n here means the number of decimal places to round it to.
Syntax
# default rounding
float_value.round
# to n decimal places
float_value.round(n)
Parameters
float_value: This is the float value we want to round.
n: Represents the number of decimal places we want to round the float_value to.
Return value
The value returned is a float rounded to the nearest value with a precision of n decimal digits or 0 digit if no parameter is passed.
Example
# create some float values f1 = 2.3333545 f2 = 1.4445567 f3 = 100.12711 f4 = -0.8889 # round float values # and print results puts f1.round # to 0 decimal place puts f2.round(3) # to 3 decimal places puts f3.round(1) # to 1 decimal place puts f4.round(2) # to 2 decimal places
Rounding decimal values to n decimal places in Ruby
Explanation
- Line 2–5: We define some float values that we want to round off.
- Linew 9–12: We call the
round()method on the already defined float values and print the results.
RELATED TAGS
ruby
decimal
communitycreator
CONTRIBUTOR
okwudili onyejiaku
RELATED COURSES
View all Courses
Keep Exploring
Related Courses
