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)
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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)
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Output:
false