Ruby | Set include?() function

The include?() is an inbuilt method in Ruby returns true if the set contains the given object. It returns false if it does not contains the given object.

Syntax: s1_name.include?(object)

Parameters: The function accepts a mandatory parameter object whose presence is to be checked for.

Return Value: It returns true if the set contains the given object or it returns false.

Example 1:

# Ruby program to illustrate
# the include method

# requires the set
require "set"

s1 = Set[16, 8, 3, 5, 2]

# include method used
puts s1.include?(2)

Output:

true

Example 2:

# Ruby program to illustrate
# the include method

# requires the set
require "set"

s1 = Set[1, 2, 3]

# include method used
puts s1.include?(5)

Output:

false