Calculator.java

import java.util.Scanner;
public class Calculator{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("========================================");
        
        System.out.println("\t       JAVA CALCULATOR           ");
        
        System.out.println("========================================");
        System.out.println(" Choose the Mathematical Operations that you want to use for your numbers:");
        System.out.println(" 1)Addition\n 2)Substraction\n 3)Multiplication\n 4)Division\n 5)Modulus\n 6)Square\n 7)Cube\n 8)Average\n 9)Percentage");
        int z = sc.nextInt();
        switch(z)
        {
            case 1:
            System.out.println("Addition");
            System.out.println("Enter integer one: ");
            int y = sc.nextInt();
            System.out.println("Enter integer two: ");
            int u = sc.nextInt();
            int sum = y+u;
            System.out.println("The Addition between " +y+ " and " +u+ " is: "+sum);
            break;

            case 2:
            System.out.println("Substraction");
            System.out.println("Enter integer one: ");
            int r = sc.nextInt();
            System.out.println("Enter integer two: ");
            int a = sc.nextInt();
            int subs = r-a;
            System.out.println("The Substraction between " +r+ " and " +a+ " is: " + subs);
            break;

            case 3:
            System.out.println("Multiplication");
            System.out.println("Enter integer one: ");
            int w = sc.nextInt();
            System.out.println("Enter integer two: ");
            int g = sc.nextInt();
            int f = w*g;
            System.out.println("The Multiplication between " +w+ " and " +g+ " is: "+f);
            break;

            case 4:
            System.out.println("Division");
            System.out.println("Enter integer one: ");
            int v = sc.nextInt();
            System.out.println("Enter integer two: ");
            int s = sc.nextInt();
            double div =(double) v/s;
            System.out.println("The Division between" +v+ " and " +s+ " is: " +div);
            break;

            case 5:
            System.out.println("Modulus");
            System.out.println("Enter integer one: ");
            int i = sc.nextInt();
            System.out.println("Enter integer two:");
            int m = sc.nextInt();
            float t = i%m;
            System.out.println("The Modulus between" +i+ " and " +m+ " is: " +t);
            break;

            case 6:
            System.out.println("Square");
            System.out.println("Enter integer one: ");
            int q = sc.nextInt();
            int pi = q*q;
            System.out.println("The Square of " +q+ " is: " + pi);
            break;

            case 7:
            System.out.println("Cubes");
            System.out.println("Enter a integer: ");
            int c = sc.nextInt();
            int cube = c*c*c;
            System.out.println("The Cube of " +c+ " is:" +cube);
            break;

            case 8:
            System.out.println("Average");
            System.out.println("Enter integer one: ");
            int b = sc.nextInt();
            System.out.println("Enter integer two: ");
            int n = sc.nextInt();
            int Average = b+n;
            int yx = Average/2;
            System.out.println("The Average between " +b+ " and " +n+ " is: " + yx);
            break;

            case 9:
            System.out.println("Percentage");
            System.out.println("Enter a number: ");
            int an = sc.nextInt();
            System.out.println("Choose the following in which you want the percentage in terms of");
            System.out.println(" 1)10% of your number\n 2)50% of your number\n 3)30% of your number\n 4)20% of your number\n 5)60% of your number");
            int xy = sc.nextInt();
            int yu = 10;
            int gh = 50;
            int hg = 30;
            int fg = 20;
            int fit = 60;
            int ui = 100;
                    float per1 = (an * yu) / 100f;
                    float per2 = (an * gh) / 100f;
                    float per3 = (an * hg) / 100f;
                    float per4 = (an * fg) / 100f;
                    float per5 = (an * fit) / 100f;
                    if(xy == 1){
                        System.out.println("10% of " + an + " is: " + per1);
                    }
                    else if(xy == 2){
                        System.out.println("50% of " + an + " is: " + per2);
                    }
                    else if(xy == 3){
                        System.out.println("30% of " + an + " is: " + per3);
                    } 
                    else if(xy == 4){
                        System.out.println("20% of" + an + " is: " + per4);
                    }
                    else if(xy == 5){
                        System.out.println("60% of" + an + " is: " + per5);
                    }
                    else{
                        System.out.println("Error: Invalid option selected.");
                    }
                    break;
        
                    default:
                    System.out.println("Hello Everyone,My name is Parth Rohilla,Hope you liked my Calculator.\nPlease do share it with your friends,i will be grateful if you did it,Thank you very much for reviewing it.");
                    break;
                }
            }

        }