# DATA TYPES

# INTEGER
# 2
# 100029

# STRING
# "Hello"
# ""
# " "
  # Interpolation
  name = "joao"
  age = 27
  "Hello #{name}, #{age}"

  # Concatenation
  "Hello " + name + ", " + age.to_s

# Single vs Double quotes
# puts "hello #{2 + 7}"
# puts 'hello #{2 + 7}'

# FLOAT
# 3.14
# 1.2343
3.14.floor
3.14.ceil
3.14.truncate

# ARRAY
# List of elements
beatles = ["john", "paul", "ringo", "george"]
beatles.sort
beatles.count



# NIL
nil
# absence of value

# BOOLEANS
  true.class  # => TrueClass
  false.class # => FalseClass

# RANGE
# (1..5)      # range from 1 to 5
# (1...5)     # range from 1 to 4

# Casting (changing the data type)
# "1991".to_i # => 1991
# "1991".to_f # => 1991.0
# (1..5).to_a # => [1,2,3,4,5]