Ruby offers an interactive shell, and working with it will help us understand the basics. So, let's get started. Open the CMD/Terminal and type irb to launch the Ruby interactive shell.
Let's input something into the Ruby shell and see what happens; suppose I type in the number 2, as follows:
irb(main):001:0> 2 => 2
The shell simply returns the value. Let's give another input, such as one with the addition operator, as follows:
irb(main):002:0> 2+3 => 5
We can see that if we input numbers in an expression style, the shell returns the result of the expression.
Let's perform some functions on the string, such as storing the value of a string in a variable, as follows:
irb(main):005:0> a= "nipun" => "nipun" ...
