C++ Module 6: Arrays

Array Overview

• An array is a special type of variable that can contain one or more values of the same data type.
• An array has a common name identifier or variable name and can hold many values at the same time, provided they have the same data type.

Learning Outcomes

• Describe the nature and purpose of an array.
• Use arrays in simple C++ programs.
• Declare, instantiate, and initialize arrays.
• Define methods that have an array as a parameter.

Declaring an Array

• To declare an array, define the variable type, specify the name of the array, and enclose the number of elements in square brackets.
• Example: string cars[4]; declares an array of four strings.

Initializing an Array

• Use an array literal to insert values into an array, by placing the values in a comma-separated list inside curly braces.
• Example: string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"]; initializes an array of four strings.
• Example: int myNum[3] = {10, 20, 30}; initializes an array of three integers.

Accessing Array Elements

• Access an array element by referring to the index number.
• The first element of an array has an index of 0.
• Example: cars[0] accesses the value of the first element in the cars array.

Array Overview

• An array is a special type of variable that can contain one or more values of the same data type.
• An array has a common name identifier or variable name and can hold many values at the same time, provided they have the same data type.

Learning Outcomes

• Describe the nature and purpose of an array.
• Use arrays in simple C++ programs.
• Declare, instantiate, and initialize arrays.
• Define methods that have an array as a parameter.

Declaring an Array

• To declare an array, define the variable type, specify the name of the array, and enclose the number of elements in square brackets.
• Example: string cars[4]; declares an array of four strings.

Initializing an Array

• Use an array literal to insert values into an array, by placing the values in a comma-separated list inside curly braces.
• Example: string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"]; initializes an array of four strings.
• Example: int myNum[3] = {10, 20, 30}; initializes an array of three integers.

Accessing Array Elements

• Access an array element by referring to the index number.
• The first element of an array has an index of 0.
• Example: cars[0] accesses the value of the first element in the cars array.

Learn about arrays in C++ programming, a data structure that holds multiple values of the same data type. Understand the purpose and nature of arrays.