how to initialize a variable to the type "double" in ruby

Question

like in C and C++

double x

How to do it in ruby ?

Or to be in the type float?

I want to run

x=5/2

then

x=2.5

instead of

x=2

Answer 1

If at least one of the operands is a float, the result will be a float too.

5 / 2.0 # => 2.5