Please help me understand (c#)

Question

I’m trying to write some code for a very basic calculator. In my mind, it should work, but I keep getting an error saying I’m using the “answer” variable without assigning it a value. Wouldn’t the switch statement do that? I don’t get it :/

The code looks like this |
|
V

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{

//creates variables and sets values
int num1 = Convert.ToInt32(Console.ReadLine());

string modifier = Console.ReadLine();

int num2 = Convert.ToInt32(Console.ReadLine());

int answer;

//sets answer value
switch(modifier){

case "+":
answer = num1 + num2;
break;

case "-":
answer = num1 - num2;
break;

case "*":
answer = num1 * num2;
break;

case "/":
answer = num1 / num2;
break;

}

Console.WriteLine("{0} {1} {3} = {4}", num1, modifier, num2, answer);
}
}
}

Answer 1

Spencer Rich , I made some corrections to your code. Hope it helps you 😺
https://code.sololearn.com/cVHp99fe9s57/?ref=app

Answer 2

whoops

thank you

Answer 3

1. You need to initialize variable <answer> to zero.
int answer = 0;

2. You are referring to an invalid index of parameter when you did this:

Console.WriteLine("{0} {1} {3} = {4}", num1, modifier, num2, answer);

It should've been

Console.WriteLine("{0} {1} {2} = {3}", num1, modifier, num2, answer);

<num1> → Index 0
<modifier> → Index 1
<num2> → Index 2
<answer> → Index 3

Hth, cmiiw