Workbook 6.14

From the Java Bootcamp Resources, launch Workbook 6.14.

Task 1

This function returns a random number between 0 and 99. Copy it into your class.

    public static int randomNumber() {
        double randomNumber = Math.random()*100;
        return (int)randomNumber;
    }

Task 2

Write a function that prints the contents of an int[][] array.

/**
 * Function name: print2DArray
 * @param array ( int[][] )
 *
 * 
 * 
 *       
 *      
 *      
 */

The function uses a nested loop. The inner loop prints each row in one line.

/**
 * Function name: print2DArray
 * @param array ( int[][] )
 *
 * Inside the function:
 *  1. Nested loop:
 *      - Inner Loop: System.out.print(array[i][j] + " ");
 *      
 */

After the inner loop runs to completion, print a new line.

/**
 * Function name: print2DArray
 * @param array ( int[][] )
 *
 * Inside the function:
 *  1. Nested loop:
 *      - Inner Loop: System.out.print(array[i][j] + " ");
 *      - After the Inner Loop Completes: System.out.print("\n");
 */

Call print2DArray for the following array.

int[][] array = {
    {48, 56, 56, 76, 0, 81, 51, 81, 99, 70},
    {38, 52, 73, 6, 10, 56, 1, 71, 47, 9},
    {85, 35, 47, 98, 91, 25, 69, 52, 2, 93}
};

Result

Delete the array if you achieve the result.

Task 3

Create a 2D array with 100 rows and 10 columns. Then call print2DArray.

Task 4

Use a nested loop to populate the array with random numbers before calling: print2DArray.

Visualizing the Runtime

After you solve this workbook, I still recommend watching the video solution on Udemy.

It will show you how to visualize the runtime using Visual Studio Code.

Associated Course: The Complete Java Development Bootcamp

Related Course: The Complete Spring Boot Development Bootcamp – Become a Java Web Developer