The empty? is an inbuilt function in Ruby checks if the queue is empty or not?. It returns a boolean value, which is true if the Queue is empty or it returns false.
Syntax: q_name.empty?
Parameters: The function does not takes any element.
Return Value: It returns true if the queue is empty else it returns false.
Example 1:
#Ruby program for empty ? function in Queue #Create a new QUEUE q1 q1 = Queue.new
#push 5 q1.push(5)
#push 6 q1.push(6)
#Checks if the queue is empty or not puts q1.empty
?
#Clears the queue q1.clear()
#Checks if the queue is empty or not puts q1.empty
?
|
Output:
false true
Example 2:
#Ruby program for empty ? function in Queue #Create a new QUEUE q1 q1 = Queue.new
#Checks if the queue is empty or not puts q1.empty
?
|
Output:
true