Rounding float in Ruby

Question

I\'m having problems rounding. I have a float, which I want to round to the hundredth of a decimal. However, I can only use .round which basically turns it in

Answer 1

You can also provide a negative number as an argument to the round method to round to the nearest multiple of 10, 100 and so on.

# Round to the nearest multiple of 10. 
12.3453.round(-1)       # Output: 10

# Round to the nearest multiple of 100. 
124.3453.round(-2)      # Output: 100

Answer 2

you can use this for rounding to a precison..

//to_f is for float

salary= 2921.9121
puts salary.to_f.round(2) // to 2 decimal place                   

puts salary.to_f.round() // to 3 decimal place          

Answer 3

what about (2.3465*100).round()/100.0?