Скачать или смотреть Lecture 5 All about Arrays

Unlock the power of arrays in programming! In this video, we dive deep into 1D and 2D arrays, covering their definition, declaration, and internal workings. Whether you're a beginner or brushing up your skills, this tutorial will help you understand how arrays store and manage data efficiently.
🔹 What You'll Learn:
Definition of Arrays: Understand what arrays are — a linear data structure that stores elements of the same type in contiguous memory locations.
1D Arrays:
A one-dimensional array is like a list. It stores elements in a single row.
Example: int numbers[5]; stores 5 integers indexed from 0 to 4.
Access elements using arr[i].
2D Arrays:
A two-dimensional array is like a matrix with rows and columns.
Example: int matrix[3][3]; creates a 3x3 grid of integers.
Access elements using arr[i][j] with nested loops.
Declaration & Initialization:
Arrays must be declared with a fixed size.
You can initialize them at the time of declaration or later using loops.
Internal Working:
Arrays are stored in contiguous memory blocks, which allows fast access using index calculations.
In 1D arrays, the address of arr[i] is calculated as base_address + i * size_of_element.
In 2D arrays (row-major order), arr[i][j] is accessed as base_address + ((i * number_of_columns) + j) * size_of_element.
This structure helps in efficient data traversal and manipulation.
💡 Why Arrays Matter:
Arrays are foundational in programming — used for storing data, implementing algorithms, and building complex data structures. Mastering arrays sets the stage for learning linked lists, stacks, queues, and more.