Z T wrote:
> When I run my program:
>
> arg1="Ruby", arg2="Rails", arg3="Rails"
> puts "#{arg1}, #{arg2}, #{arg3}"
>
> Why is the output as follow:
> RubyRailsRails, Rails, Rails
>
> What is the reason for this output? Thanks in advance.
>
>   
The reason is that assignment returns something. So arg3="Rails" 
actually returns the string "Rails" and as the other posters have 
pointed out the comma is a way of listing array items. So starting from 
the right

arg1="Ruby", arg2="Rails", arg3="Rails"


We do the first assignment (arg3="Rails") which gives us

arg1="Ruby", arg2="Rails", "Rails"

We do the second assignment (arg2="Rails") which gives us

arg1="Ruby", "Rails", "Rails"

And finally we do the last assignment (arg1="Ruby", "Rails", "Rails")

Clear as mud :)