CODEWITHSUNDEEP
rubystringfloating-pointdigits
oldhomemovie
oldhomemovie

Reputation: 15129

Ruby: counting digits in a float number

Is there any worthy Ruby method to count the number of digits in a float? Also, how do I specify the precise when to_s float numbers?

Upvotes: 4

Views: 7167

Answers (3)

Postscripter
Postscripter

Reputation: 521

to specify precision of a float in Ruby. you can use the round method.

number.round(2)

2 is the precision.

53.819.round(2) -> 53.82

Upvotes: 2

khelll
khelll

Reputation: 24020

# Number of digits

12345.23.to_s.split("").size -1 #=> 7

# The precious part

("." + 12345.23.to_s.split(".")[1]).to_f #=> .023

# I would rather used 
# 12345.23 - 12345.23.to_i 
# but this gives 0.22999999999563

Upvotes: 6

Mike Buckbee
Mike Buckbee

Reputation: 6993

I think you should check out the number_with_precision helper.

number_with_precision(13, :precision => 5) # => 13.00000

Upvotes: 1

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