Why won't the final result show up?

Question

Doing a basic calculator just from my own thought. Can't get the output to come up, any reason?

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)
{
Console.WriteLine("Enter your first number: ");
double num1 = Convert.ToDouble(Console.ReadLine());
Console.WriteLine(num1);

Console.WriteLine("Enter your second number: ");
double num2 = Convert.ToDouble(Console.ReadLine());
Console.WriteLine(num2);

Console.WriteLine("Would you like to (+), (-), (*), or (/)?: ");
string ans = Console.ReadLine();

if (ans == "+")
{
Console.WriteLine("The answer is ", + (num1 + num2));
}
else if (ans == "-")
{
Console.WriteLine("The answer is ", (num1 - num2));
}
else if (ans == "*")
{
Console.WriteLine("The answer is ", (num1 * num2));
}
else
{
Console.WriteLine("The answer is ", (num1 / num2));
}
}
}
}

Answer 1

1. String comparison in C# is performed by using Equals() method. So your conditions for checking operations would be

if( ans.Equals( "+" ) ) // all other operation goes like this

2. When printing output, use placeholders where you want the value to be

Console.WriteLine( "The answer is: {0}", num1 + num2 );

The same format is applicable for other operations.

Try to fix these first, then let me know ...

P.S. And please put C# into the tags ☝

Answer 2

Thank you for reply. Yes my issue was formatted strings, I did what you mentioned like so...

if (ans == "+")
{
Console.WriteLine("The answer is {0}", (num1 + num2));
}

This worked, thank you. Sorry am new, will put tags in from now on!