Number

Question 1

How to transform numbers into binary code?

Answer 1

10.to_s(2) # => “1010”

Question 2

Can you provide an example of when float numbers are inaccurate and return the wrong values?

Answer 2

# first 
a = 0.0
1000.times { a += 1.1 }
# a == 1100.0000000000086 

second

1.4 + 1.2 
# 2.5999999999999996

Question 3

How to fix the problem using inaccurate float value?

Answer 3

1.4 + 1.2 
# 2.5999999999999996

# solution 1 use rational numbers
(1.4r + 1.2r).to_f
# 2.6

solution 2 use BigDecimal
require ‘bigdecimal’
BigDecimal(‘1.2’) + BigDecimal(‘1.4’)