5.2.2. Defining a 2D array, Chapter - 5, Arrays and String, HSSC-II (12th Class) Computer Science Key Point Notes

12th Class (HSSC-II) Computer SLO Based Key Point Notes

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Unit 5: Arrays and String

5.2.2. Defining and Initializing a Two-Dimensional Array:

Defining a 2D array

To define a 2D Araay in C++, the type of the elements, the name of the array, and the number of elements it is required to store in rows and columns is mentioned in the declaration statement.  Following is the general syntax of the declaration of the 2D array in C++:

           

         data_type Array_name[Row size][column size];

For example:         int table [5][2];

To specify any element in a 2D array, we need the array name followed by row no. and column no.

Initializing 2D Array

A 2D array can be initialized by assigning values row-wise as given below:

            int table[3][2] = { { 2, 3 }, { 34, 1 }, { 3, 31} };

Nested braces are used for assigning values row-wise.

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5.1. Introduction to Arrays:

5.1.1 Comcept of an Array:

5.1.2. Declaring (defining) an Array

5.1.3. Initialization of Array

5.1.4. Using Arrays in Programs:

5.1.5. The Sizeof() Function

5.2.1. Introduction of Two-Dimensional Arrays

5.2.2. Defining and Initializing a Two-Dimensional Array:

5.2.3. Accessing and Filling a 2D array

5.3.1 Introduction to Strings

5.3.2 Defining (declaration) a String

5.3.2 Initializing a String

5.4 Commonly used String Function

Chapter 5 (Complete Key Point Notes)

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