Array Visualizer
Interactive visualization of array operations with step-by-step code execution
Array Structure
10[0]
25[1]
33[2]
47[3]
52[4]
Array Length: 5 | Capacity: Dynamic
Array Operations
Insert Element
Search Element
Array Insert Operation
1function insertAtIndex(array, index, value) {
2 // Check if index is valid
3 if (index < 0 || index > array.length) {
4 throw new Error('Index out of bounds');
5 }
6
7 // Shift elements to the right
8 for (let i = array.length; i > index; i--) {
9 array[i] = array[i - 1];
10 }
11
12 // Insert the new value
13 array[index] = value;
14
15 return array;
16}Step 1 of 5
Validate that the index is within valid bounds
About Arrays
Understanding the fundamentals, properties, and complexity analysis of array data structures
What is an Array?
An array is a linear data structure where elements are stored in contiguous memory locations. Each element can be accessed directly using its index, making arrays one of the most fundamental and efficient data structures for random access operations.
Advantages
- Constant time random access O(1)
- Memory efficient - no extra pointers
- Excellent cache locality
Disadvantages
- Fixed size (in static arrays)
- Expensive insertion/deletion in middle
- Memory waste if not fully utilized
Properties
Type:Linear Static
Memory:Contiguous
Access:O(1)
Search:O(n)
Insert (End):O(1)
Insert (Middle):O(n)
Common Use Cases
Data Storage
Store collections of similar elements
Lookup Tables
Fast access to data by index
Mathematical Computations
Matrix operations, vectors
Sorting Algorithms
Foundation for sorting implementations
Buffer Management
Temporary storage in I/O operations
Time Complexity
Access
By indexO(1)
Linear searchO(n)
Insertion
At endO(1)
At beginning/middleO(n)
Deletion
From endO(1)
From beginning/middleO(n)