Ruby | Queue size() function

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

Syntax: q_name.size()

Parameters: The function does not takes any parameter.

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

Example 1:

#Ruby program for size() function in Queue

#Create a new QUEUE q1
q1 = Queue.new

#pushes 5
     q1.enq(5)

#pushes 6
         q1.enq(6)

#Prints the size
             puts q1.size

#Pops the element
                 q1.pop

#Prints the size
                     puts q1.size

Output:

2
1

Example 2:

#Ruby program for size() function in Queue

#Create a new QUEUE q1
q1 = Queue.new

#Prints the size
     puts q1.size

#pushes 5
         q1.enq(5)

#pushes 6
             q1.enq(6)

#pushes 7
                 q1.enq(7)

#Prints the size
                     puts q1.size

#Pops the element
                         q1.pop

#Prints the size
                             puts q1.size

Output:

0
3
2

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