Chapter 7, Problem 9SA

Program Plan Intro

Two-dimensional array:

A two dimensional array is also called as a multi-dimensional array; a multidimensional array is that all the identical arrays are put together into a single array.

• This is useful for storing same type of multiple sets of data in same place.
• The main advantage is that one-dimensional array can hold only one set of value, whereas, two-dimensional array can hold multiple sets of data in the form of rows and columns.
• The structure of a multi-dimensional array is lookalike a table (that is combination of rows and columns); it contains same type of columns.
• The first size declarator in the two-dimensional array represents row and the second size declarator represents column.
• The two dimensional array can have multiple length fields, which holds the number of rows.
  • Each row in the two dimensional array has a length field which holds the number of columns.

Syntax:

The syntax of two dimensional arrays is as follows:

datatype array_name [number_of_rows][number_of_columns];

Explanation of Solution

b. Number of columns in the array:

Syntax:

The syntax of two dimensional arrays is as follows:

datatype array_name [number_of_rows][number_of_columns];

Explanation of Solution

c. Number of elements in the array:

Syntax:

The syntax of two dimensional arrays is as follows:

datatype array_name [number_of_rows][number_of_columns];

Given array definition:

double[][] sales = new double[8][10];

...

Explanation of Solution

d. Statement that stores a number in the last column of the last row in the array:

Syntax:

The syntax of two dimensional arrays is as follows:

datatype array_name [number_of_rows][number_of_columns];

Given array definition:

double[][] sales = new double[8][10];

There are 8 rows and 10 columns in the given two-dimensional array.

Index type of an array:

The index type of an array is an integer. An integer is a number without the fractional or decimal part...