Queue Data Structure Visualizer - FIFO Operations

Queue Data Structure: how it works

A Queue is a linear data structure that follows the First-In-First-Out (FIFO) principle. Think of it like a line of people waiting: the first to arrive is the first to be served.

1. Enqueue (Insert)

   Adds an item to the rear (end) of the queue.

2. Dequeue (Remove)

   Removes the item from the front (start) of the queue.

3. Peek Front

   Returns the element at the front of the queue without removing it.

Complexity

Best-case time

O(1)

Average time

O(1)

Worst-case time

O(1)

Space

O(N)

In a standard queue, both enqueue (adding to the back) and dequeue (removing from the front) operations occur in constant O(1) time.