Ruby | Queue close() function

The close() is an inbuilt function in Ruby closes the queue permanently and does not allow any more push or pop operations in it. A closed queue cannot be re-opened. 

Syntax: q_name.close()

Parameters: The function does not takes any element.

Return Value: It closes the queue and does not returns anything.

Example 1: 

Output:  

5
true

Example 2: 

Output: 

true

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