Ruby | Queue length() function

The length() is an inbuilt function in Ruby returns the current length of the Queue or the number of objects present in it.

Syntax: q_name.length()

Parameters: The function does not takes any parameter.

Return Value: It returns the number of elements in the queue.

Example 1:

#Ruby program for length() function in Queue

#Create a new QUEUE q1
q1 = Queue.new

#pushes 5
     q1.enq(5)

#pushes 6
         q1.enq(6)

#Prints the length
             puts q1.length

#Pops the element
                 q1.pop

#Prints the length
                     puts q1.length

Output:

2
1

Example 2:

#Ruby program for length() function in Queue

#Create a new QUEUE q1
q1 = Queue.new

#Prints the length
     puts q1.length

#pushes 5
         q1.enq(5)

#pushes 6
             q1.enq(6)

#pushes 7
                 q1.enq(7)

#Prints the length
                     puts q1.length

#Pops the element
                         q1.pop

#Prints the length
                             puts q1.length

Output:

0
3
2

Reference: https://devdocs.io/ruby~2.5/queue#method-i-length