calculator in java using methods
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) {
Scanner kb = new Scanner(System.in);
System.out.println("Simple Calculator");
System.out.println("\nHere are your options:");
System.out.println("\n1. Addition");
System.out.println("2. Subtraction");
System.out.println("3. Division");
System.out.println("4. Multiplication");
System.out.print("\nWhat would you like to do?: ");
int choice = kb.nextInt();
System.out.println();
if (choice == 1){
addition();
}
else if (choice == 2){
subtraction();
}
else if (choice == 3){
division();
}
else if (choice == 4){
multiplication();
}
System.out.println();
kb.close();
}
public static void addition(){
int nOne, nTwo;
Scanner kb = new Scanner(System.in);
System.out.println("Addition");
System.out.print("\nFirst Number: ");
nOne = kb.nextInt();
System.out.print("\nSecond Number: ");
nTwo = kb.nextInt();
kb.close();
System.out.println("\nSum: " + nOne + " + " + nTwo + " = " + (nOne + nTwo));
}
public static void subtraction(){
int nOne, nTwo;
Scanner kb = new Scanner(System.in);
System.out.println("Subtraction");
System.out.print("\nFirst Number: ");
nOne = kb.nextInt();
System.out.print("\nSecond Number: ");
nTwo = kb.nextInt();
kb.close();
System.out.println("\nSum: " + nOne + " - " + nTwo + " = " + (nOne - nTwo));
}
public static void division(){
int nOne, nTwo;
Scanner kb = new Scanner(System.in);
System.out.println("Division");
System.out.print("\nFirst Number: ");
nOne = kb.nextInt();
System.out.print("\nSecond Number: ");
nTwo = kb.nextInt();
kb.close();
System.out.println("\nSum: " + nOne + " / " + nTwo + " = " + (nOne / nTwo));
}
public static void multiplication(){
int nOne, nTwo;
Scanner kb = new Scanner(System.in);
System.out.println("Multiplication");
System.out.print("\nFirst Number: ");
nOne = kb.nextInt();
System.out.print("\nSecond Number: ");
nTwo = kb.nextInt();
kb.close();
System.out.println("\nSum: " + nOne + " x " + nTwo + " = " + (nOne * nTwo));
}
}