Having trouble initializing variables

Question

For some reason in the try it yourself i tried to make a sentence by initializing three variables and tried to put them together but the output said there was a variable that wasn't initialized

Answer 1

Can you show us your code?

Answer 2

I realized that I forgot to add spaces when I was initializing the variables

Answer 3

x = 9
y = "This is a string"
Z = 90

puts x
puts y

Z = 28

# Z is a constant because constant variables are on capital letter. Contant variables cannot be replaced.