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Calculator.java

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import java.util.Scanner;

public class Calculator {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.println("Simple Calculator");

System.out.print("Enter the first number: ");

double num1 = scanner.nextDouble();

System.out.print("Enter the second number: ");

double num2 = scanner.nextDouble();

System.out.println("Select operation (+, -, *, /): ");

char operator = scanner.next().charAt(0);

double result;

switch (operator) {

case '+':

result = num1 + num2;

break;

case '-':

result = num1 - num2;

break;

case '*':

result = num1 * num2;

break;

case '/':

if (num2 != 0) {

result = num1 / num2;

} else {

System.out.println("Error: Division by zero");

return;

}

break;

default:

System.out.println("Error: Invalid operator");

return;

}

System.out.println("Result: " + result);

}

}