Workbook 6.11

From the Java Bootcamp Resources, launch Workbook 6.11.

Task 1

Create a function called celciusToFahrenheit.

/**
 * Function name: celciusToFahrenheit.
 * 
 * 
 *
 * 
 *   
 */

The function will receive an array of values in Celcius.

/**
 * Function name: celciusToFahrenheit.
 * @param celsius ( double[] )
 * 
 *
 * 
 *   
 */

The function will return an array of values in Fahrenheit.

/**
 * Function name: celciusToFahrenheit.
 * @param celsius ( double[] )
 * @return fahrenheit ( double[] )
 * 
 * 
 *   
 */

1. The function creates a double[] array called fahrenheit.

/**
 * Function name: celciusToFahrenheit.
 * @param celsius ( double[] )
 * @return fahrenheit ( double[] )
 *
 * Inside the function:
 *    1. Creates a double[] array called 'fahrenheit'.
 *    
 *    
 *     
 */

2. The function copies every value from the celcius parameter to the fahrenheit array.

/**
 * Function name: celciusToFahrenheit.
 * @param celsius ( double[] )
 * @return fahrenheit ( double[] )
 *
 * Inside the function:
 *    1. Creates a double[] array called 'fahrenheit'.
 *    2. Copies all the values from celsius to fahrenheit.
 *    
 *     
 */

3. The function uses the formula below to convert every value in the fahrenheit array to Fahrenheit.

/**
 * Function name: celciusToFahrenheit.
 * @param celsius ( double[] )
 * @return fahrenheit ( double[] )
 *
 * Inside the function:
 *    1. Creates a double[] array called 'fahrenheit'.
 *    2. Copies all the values from celsius to fahrenheit.
 *    3. Updates the fahrenheit values (F = (C/5 * 9) + 32).
 * 
 */

4. Finally, the function returns the result.

/**
 * Function name: celciusToFahrenheit.
 * @param celsius ( double[] )
 * @return fahrenheit ( double[] )
 *
 * Inside the function:
 *     1. Creates a double[] array called 'fahrenheit'.
 *     2. Copies all the values from celsius to fahrenheit.
 *     3. Updates the fahrenheit values (F = (C/5 * 9) + 32).
 *     4. return fahrenheit.
 */

Task 2

The starter code contains an array of Celsius values.

double[] celsius = {12.5, 14.5, 17.0, 21.0, 23.0, 18.5, 20.0};

Use your function to return an array of Fahrenheit values from the celsius array.

double[] fahrenheit = celciusToFahrenheit(celsius);

Print the contents of fahrenheit using Arrays.toString.

Result

>>: [54.5, 58.099999999999994, 62.5999999999994, 69.800000000001, 73.4, 65.300000000001, 68.0]

Task 3

Remove your print statement. Instead, create a function that receives a double[] array and a String.

/**
 * Function name - printTemperatures
 * @param temp ( double[] )
 * @param tempType ( String ) can be: Celsius or Fahrenheit
 *
 * 
 *
 *  
 *      
 *      
 *
 */

1. The function prints the temperature type using print, not println.

/**
 * Function name - printTemperatures
 * @param temp ( double[] )
 * @param tempType ( String ) can be: Celsius or Fahrenheit
 *
 * Inside the function:
 *  1. System.out.print(tempType + ": ");
 *  
 *    
 *      
 * 
 */

2. The function uses a for loop to print the temperatures on the same line.

/**
 * Function name - printTemperatures
 * @param temp ( double[] )
 * @param tempType ( String ) can be: Celsius or Fahrenheit
 *
 * Inside the function:
 *  1. System.out.print(type + ": ");
 *  2. A loop prints the temperatures in ONE line System.out.print(temp[i] + " ");
 *    
 *  
 */

3. The function prints a new line after the loop.

/**
 * Function name - printTemperatures
 * @param temp ( double[] )
 * @param tempType ( String ) can be: Celsius or Fahrenheit
 *
 * Inside the function:
 *  1. System.out.print(type + ": ");
 *  2. A loop prints the temperatures in ONE line System.out.print(temp[i] + " ");
 *  3. Prints a new line after the loop System.out.print("\n");
 */

Task 4

Call printTemperatures for each array.

        double[] celsius = {12.5, 14.5, 17.0, 21.0, 23.0, 18.5, 20.0};
        double[] fahrenheit = celsiusToFahrenheit(celsius);

        printTemperatures(celsius, "Celsius");
        printTemperatures(fahrenheit, "Fahrenheit");

Result

>>: Celsius: 12.5 14.5 17.0 21.0 23.0 18.5 20.0
>>: Fahrenheit: 54.5 58.099999999999994 62.599999999999994 69.80000000000001 73.4 65.30000000000001 68.0

Don't mind the decimal points. You will learn rounding in Module 2.

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.

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Associated Course: The Complete Java Development Bootcamp

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