When are local variables initiated in Ruby

In Ruby, everytime we execute 1 function, all local variables in this function will be initialize BEFORE we run code in it.

For example:

# irb

def test_func
  binding.pry
  if fasle
    x = 2
  end
end

test_func

If you stay at binding.pry and call: local_variables, you can see variable x is defined, with value = nil, dispite the code x = 2 is not execute.

TuanTran 06-05-2019