Ruby | Enumerable include?() function

The include?() of enumerable is an inbuilt method in Ruby returns a boolean value. It returns true if the enumerable contains the given elements, or else it returns false.

Syntax: enu.include?(el)

Parameters: The function takes an element which is to be checked for.

Return Value: It returns a boolean value.

Example #1:

# Ruby program for include? method in Enumerable

# Initialize
enu = [2, 8, 9, 10, 23]

# Prints
puts enu.include?(8)

puts enu.include?(7)

Output:

true
false

Example #2:

# Ruby program for include? method in Enumerable

# Initialize
enu = (20..30)

# Prints
puts enu.include?(10)

puts enu.include?(29)

Output:

false
true