Arrays in Computer Programming 2

12 Questions

What is the primary benefit of using arrays to store multiple values?

To enable faster sorting and searching

What determines the memory location of an array element?

The index of the element

What is a characteristic of multiple-subscripted arrays?

They have multiple indices

What is an advantage of using arrays to store data?

They can store a large number of values with a single name

What is the term for the total number of elements in an array?

Length

What type of data can an array store?

Any type, including user-defined types

What is the primary purpose of using an array in a program?

To store a large number of variables of the same type under a single variable

What is the correct way to declare an array in Visual C++?

type name [elements];

What is the purpose of the 'elements' field in an array declaration?

To specify the number of elements the array can contain

How can you access a specific element in an array?

Using the array name with an index

What is the correct way to initialize an array without specifying its size?

int myArray [] = {4, 8, 9, 10, 3};

What is the restriction on the number of values when initializing an array?

The number of values must be less than or equal to the number of elements

Study Notes

Introduction to Arrays

An array is a derived data type used to store a collection of data or variables of the same type.
Arrays consist of contiguous memory locations, with the lowest address corresponding to the first element and the highest address to the last element.

Characteristics of Arrays

Arrays can store a large number of values with a single name.
Arrays are used to process many values easily and quickly.
The values stored in an array can be sorted easily.
The search process can be applied on arrays easily.

Need for Arrays

To store a large number of variables of the same type under a single variable.
For easy understanding of the program.

Declaration of an Array

A typical declaration for an array in Visual C++ is: type name [elements];
type is a valid type (like int, float, etc.).
name is a valid identifier.
elements field specifies how many elements the array has to contain (number of elements that can be stored).

Initializing Arrays

Arrays can be initialized in three ways:
- With array size but without values, e.g., int myArray[];
- With array size and values, e.g., int myArray[] = {4, 8, 9, 10, 3};
- Without array size but with values, e.g., int myArray[] = {4, 8, 9, 10, 3};
The number of values between braces { } should not be greater than the number of elements in the array.