What is Queue data structure
A Queue is a Linear data structure, used to store the data effectively and efficiently.
It follows First in First Out(FIFO). Elements are inserted at the end of the Queue and deleted from the beginning of a queue.
Queue stores different types of the Elements such as strings, integers, etc.
It provides different operations or methods to work with Queue
The queue can be implemented using Array or LinkedList
Queue Operations
The queue contains the following basic operations
push: Adds an element to a Stackpop: Removes an element from a stacktop: Returns the top element of a stackisEmpty: true, if the stack is empty, false if the stack is not emptysize: Returns the size of an element
Stack vs Queue
| Stack | Queue |
|---|---|
| Last In First Out | First In First Out |
| Linear Data structure | Linear Data structure |
| Add and delete elements from the top of a list | Add and delete elements from both sides. Adds elements to rear list, Delete an element from the Front of a list |
| Add an element to Stack called Push | Add an element to Queue called Enqueue |
| Removes an element from a stack called Pop | Removes an element is called Dequeue |
| Recursion used for Data storage | sequential processing for data process |