Ruby | Queue << function

The <<() is an inbuilt function in Ruby inserts the element in the queue.

Syntax: q_name << element

Parameters: The function takes the element to be inserted into the queue.

Return Value: It inserts the element into the queue.

Example 1:

#Ruby program for << function in Queue

#Create a new QUEUE q1
q1 = Queue.new

#push 5
     q1
     << 5
#push 6
     q1
     << 6

#Prints the element
        puts q1.pop
            puts q1.pop

Output:

5
6

Example 2:

#Ruby program for << function in Queue

#Create a new QUEUE q1
q1 = Queue.new

#push 10
     q1
     << 10

#push 12
     q1
     << 12

#Prints the element
        puts q1.pop

#Again pushes 13
            q1
     << 13

#Prints the element
        puts q1.pop

#Prints the element
            puts q1.pop

Output:

10
12
13

Reference: https://devdocs.io/ruby~2.5/queue#method-i-3C-3C