boolean.rb

# Boolean
# In Ruby, a boolean is a data type that can have one of two values: `true` or `false`. These values are used to represent the truthiness of an expression or condition. Booleans are commonly used in control flow statements, such as `if`, `unless`, `while`, and `until`, to determine the flow of execution based on certain conditions.
# All data in ruby is truthy except `false` and `nil`, which are falsy.

# Example of boolean values
is_ruby_fun = true
is_sky_green = false

puts "Is Ruby fun? #{is_ruby_fun}" # Output: Is Ruby fun? true
puts "Is the sky green? #{is_sky_green}" # Output: Is the sky green? false

# Not string but boolean 
p is_ruby_fun # Output: true
p is_sky_green # Output: false