1) Create a method Sum to include a FOR loop. Get a scanner and input a number form the keyboard in main(). The method will take one parameter and calculate the sum up to that number. For example, if you pass 5, it it will calculate 1+2+3+4+5 and will return it back to main() method. Main method should call the method, get the sum back, and print a sum. You call the method from main() and get the result back to main() 2) Create another method: Factorial that calculates a Product of same numbers, that Sum does for summing them up. Make sure you use FOR loop in it. 3) Make a switch that Calls either sum(...) method OR factorial(...) method, depending on what user of the program wants. Ask the user to enter a selection, after the number is entered, such as "do sum" or "do factorial", read it with the Scanner next(), then call the appropriate method in a switch.

The following Java code creates both methods using a for loop. Asks the user for the value and choice of method within the main() and uses a switch statement to call the correct method.

import java.util.Scanner;

class Brainly {

static Scanner in = new Scanner(System.in);

public static void main(String[] args) {

System.out.println("Enter a value: ");

int userValue = in.nextInt();

System.out.println("Enter a Choice: \ns = do Sum\nf = do Factorial");

String choice = in.next();

switch (choice.charAt(0)) {

case 's': System.out.println("Sum of up to this number is: " + sum(userValue));

break;

case 'f': System.out.println("Factorial of up to this number is: " + factorial(userValue));

break;

default: System.out.println("Unavailable Choice");

}

public static int sum(int userValue) {

int sum = 0;

for (int x = 1; x <= userValue; x++) {

sum += x;

}

return sum;

}

public static int factorial(int userValue) {

int factorial = 1;

for (int x = 1; x <= userValue; x++) {

factorial *= x;

}

return factorial;

}