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package advancedCalculator;

import java.util.Scanner;

/**

* @author Fatih ARI - 21.08.2021

*

* In addition to addition, subtraction, multiplication and division, a calculator program with advanced functions has been designed by performing mathematical operations such as mode taking, finding exponential numbers, factorial calculation, finding the area and perimeter of a rectangle.

*

*/

public class Main

{

static int x, y, key;

public static void gettingInputs()

{

Scanner input = new Scanner(System.in);

while(key!=9){

System.out.print("\n1-Addition\n2-Subtraction\n3-Multiplication\n4-Division\n5-Exponent\n6-Factorial\n7-Modular\n8-Rectangular Perimeter and Area\n9-Exit\n");

key = input.nextInt();

if(key==9){

System.out.println("See you later. Goodbye.");

break;

}

System.out.print("Enter Number \"x\": ");

x = input.nextInt();

if(key!=6){ //in factorial calculation, there is only one number.

System.out.print("Enter Number \"y\": ");

y = input.nextInt();

}

System.out.println("");

calculatorOperations();

}

input.close();

}

public static void calculatorOperations()

{

switch (key) {

case 1:

System.out.println("Result of addition is " +(x+y));

break;

case 2:

System.out.println("Result of subtraction is " + (x-y));

break;

case 3:

System.out.println("Result of multiplication is " + (x*y));

break;

case 4:

if(y!=0)

System.out.println("Result of division is " + ((float)x/(float)y));

else

System.out.println("You made an incorrect entry.");

break;

case 5:

System.out.println("The result of the " + x + "^" + y + " exponent operation is: " + Math.pow(x,y));

break;

case 6:

System.out.println("Result of factorial is " + facto(x));

break;

case 7:

System.out.println("The result of the " + x + " % " + y + " modular operation is: " + x%y);

break;

case 8:

System.out.println("The result of the perimeter of rectangular: " + 2*(x+y));

System.out.println("The result of the area of rectangular: " + (x*y));

break;

default:

System.out.println("An incorrect entry was made.");

break;

}

}

private static int facto(int x)

{

int total=1;

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

total*=i;

}

return total;

}

public static void main(String[] args)

{

clearScreen();

gettingInputs();

}

//It is used for console screen cleaning in Java.

public static void clearScreen() {

System.out.print("\033[H\033[2J");

System.out.flush();

}

}