Calculator
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import java.util.Scanner;
class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("Welcome to Calculator!!");
System.out.println("'+' Addition");
System.out.println("'-' Subtraction");
System.out.println("'*' Multiplication");
System.out.println("'/' Division\n");
while(true){
System.out.println("Please choose the symbols first!! |+, -, *, /|\n");
String symbols = scanner.nextLine();
if(symbols.equalsIgnoreCase("exit")){
System.out.println("Thank you for using the Calculator!!");
break;
}
switch (symbols){
case "+":
System.out.println("First Number: ");
double first_number = scanner.nextDouble();
scanner.nextLine();
System.out.println("Second Number: ");
double second_number = scanner.nextDouble();
scanner.nextLine();
double result;
result = first_number + second_number;
System.out.println(first_number + " + " + second_number + " = " + result);
break;
case "-":
System.out.println("First Number: ");
double first_number_2 = scanner.nextDouble();
scanner.nextLine();
System.out.println("Second Number: ");
double second_number_2 = scanner.nextDouble();
scanner.nextLine();
double result_2;
result_2 = first_number_2 - second_number_2;
System.out.println(first_number_2 + " - " + second_number_2 + " = " + result_2);
break;
case "*":
System.out.println("First Number: ");
double first_number_3 = scanner.nextDouble();
scanner.nextLine();
System.out.println("Second Number: ");
double second_number_3 = scanner.nextDouble();
scanner.nextLine();
double result_3;
result_3 = first_number_3 * second_number_3;
System.out.println(first_number_3 + " × " + second_number_3 + " = " + result_3);
break;
case "/":
System.out.println("First Number: ");
double first_number_4 = scanner.nextDouble();
scanner.nextLine();
System.out.println("Second Number: ");
double second_number_4 = scanner.nextDouble();
scanner.nextLine();
double result_4;
result_4 = first_number_4 / second_number_4;
System.out.println(first_number_4 + " ÷ " + second_number_4 + " = " + result_4);
break;
default:
System.out.println("SYSMBOL INVALID!!");
break;
}
}
scanner.close();
}
}
Java
INFO