Java Bootcamp – Workbooks and Challenges
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# Workbook 6.14

From the `Java Bootcamp Resources`, launch `Workbook 6.14`.

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;
}
``````

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.

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

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.

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

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