Which value will the constants hold if we assign two values to a single constant

Question

Constant are those that begin with capital letter. ww are assigning two values say X=4 and then X=7. which value will it have?
we are given a warning message when we try to change the value
say X=4
X=7
puts X
need result of this Constant X

Answer 1

u cant change the value of a constant why do u even bother trying to change it to 4

Answer 2

i am just giving it a try to chek it. when i tried it it gave the value 7 and not 4

Answer 3

You've asked a good point, most people usually overlook these small stuffs.

In Ruby you can change the value of a Constant.

-_-

That's why you're getting 7 instead of 4.

X = 7
X = 4 # Will raise a warning, (eval):1: warning: already initialized constant X

But, that's just a warning, it'll still assign X as 4.
This is thanks to some of the weird decisions of Matz.

If you truly want a value to be immutable, freeze the variable,

MY_CONSTANT = "foo".freeze
MY_CONSTANT << "bar" # => RuntimeError: can't modify frozen string

Example taken from, http://blog.honeybadger.io/when-to-use-freeze-and-frozen-in-ruby/

Answer 4

thank u for ur clarification