Please explain the concepts of arrays (multidimensional and jagged arrays)

Answer 1

Regardless of languages, i think you’re asking “What is a matrix?”

matrix = [
0 0 0
0 0 0
0 0 0
]

Written in most programs as:
matrix = [[0,0,0],[0,0,0],[0,0,0]]

Matrices are complicated structures with their own behaviours in mathematics. Multiplying two matrices is not the same as multiplying two integers.

This article gives a nice explanation of some of the concepts of manipulating mattices:

http://polymathprogrammer.com/2008/08/11/matrices-for-programmers/

After you read that, i suggest looking up whatever language youre coding in. Matrices in python are handled differently than in C++ but the fundamental concepts are the same.

Answer 2

Basically, arrays within arrays. This means that within your array, you can group your elements.

Answer 3

arr[3][3] = {{1,2,3},{4,5,6},{7,8,9}};

// Representation of 2D array
1 2 3
4 5 6
7 8 9

arr[3][ ] = {{1,2,3},{4,5},{6,7,8,9}};

// Representation of jagged array
1 2 3
4 5
6 7 8 9

Almost every row in a jagged array has different number of columns.

Answer 4

Please add C# in the thread tags (your current selection for language course) 👍