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)
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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)
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Output:
false true