// Group Names: // Date: // Program Description:

// Import required packages //-->

// Declare class (SwitchDoLab) //-->

{

// Declare the main method //-->

{

// Declare Constant integers SUM = 1, FACTORIAL = 2, QUIT = 3. //--> //--> //-->

// Create an integer variable named choice to store user's option. //-->

// Create a Scanner object

// Create a do-while loop that exits only when the user chooses quit (choice = QUIT) // Have the do-statement here

{ // Print the following options: // "This proram does the following:" //-->

// "1. Sum of numbers from 1 to n" //-->

// "2. Factorial of n" //-->

// "3. Quit" //-->

// "Please choose an option " //-->

// Read the value the user enters and store it in an integer variable //--> choice = scan.nextInt();

// Create a switch statement with the variable that stores the option as input for the 3 cases

{ //add up all the numbers from 1 to the number you entered // case SUM:

// Ask the user to enter a number,

// Take user input and put it into the variable //--> int value = scan.nextInt();

// Define 2 integer variables, one is to store the summation, the other is to store current number; and initialize them to 0 //--> //-->

// Use a while loop to calculate the sum // Add the while-statement with the condition that variable is less than the number you entered

{ // increment the current number;

// Calculate the summation by adding summation = summation + current; } // Print the answer saying: 'Sum of numbers from 1 - ' ' is ' ' //--> System.out.println("Sum of numbers from 1 - " + value + " is " + summation);

// exit from the switch with a break statement, what happens if you don't use one? break; //Calculate the product of all numbers from 1 to the number you entered // case FACTORIAL: //--> case FACTORIAL: // Ask the user to enter a number, (if the number is too large, the factorial result will become negative, why?) //-->

// Take user input and put it into the variable //-->

// Declare an long variable to store current product and initialize it to 1 //-->

// Use a for loop to calculate the factorial of n // Write a for loop with an integer variable and initialize it to the number you entered, // condition that greater than 1, decrement by 1 for(int i= value2; > 1 ; ) {

value3 = value3 * i; } // Print the answer saying: 'Factorial of ' ' is ' ' //--> System.out.println("Factorial of " + value2 + " is " + value3);

// exit from the switch with a break statement. //--> break;

// case QUIT: //-->

// Print 'Your choice was Quit, Quitting the program, ' //-->

// exit from the switch with a break statement //-->

// default: default: // Print 'Incorrect choice ' ' Please choose again' //--> System.out.println("Incorrect choice " + choice + " Please choose again ");

// break statement here is optional, why? //--> break; // Close the switch statement //--> } // Close the do-while loop with a condition that the user's choice is not equal to QUIT }while() // Close the main method //--> } //Close the Class //-->