Ruby | Array class include?() operation

Array#include?() : include?() is a Array class method checks if the argumented object is present in the array or not.

Syntax: Array.include?()

Parameter: obj – element to find

Return: true – if the element is present; otherwise false

Code #1 : Example for include?() method

# Ruby code for include?() method

# declaring array
a = [18, 22, 33, nil, 5, 6]

# declaring array
b = [1, 4, 1, 1, 88, 9]

# declaring array
c = [18, 22, nil, nil, 50, 6]

# include?
puts "include? : #{a.include?(5)}\n\n"

# include?
puts "include? : #{b.include?(0)}\n\n"

# include?
puts "include? : #{c.include?(nil)}\n\n"

Output :

include? : true

include? : false

include? : true

Code #2 : Example for include?() method

# Ruby code for include?() method

# declaring array
a = ["abc", "nil", "dog"]

# declaring array
b = ["cow", nil, "dog"]

# declaring array
c = ["cat", nil, nil]

# include?
puts "include? : #{a.include?("cat")}\n\n"

# include?
puts "include? : #{b.include?("nil")}\n\n"

# include?
puts "include? : #{c.include?("cat")}\n\n"

Output :

include? : false

include? : false

include? : true