How to mention a variable in text ?

Question

How to mention a variable in text ? Example:
int number1 = 1;
int number2 = 2;
What is the result of number1 + number2 ?
or
What is the result of 1 + 2 ?
Thanks.

Answer 1

using System;
class MainClass {
public static void Main (string[] args) {
int number1 = 1;
int number2 = 2;
Console.WriteLine("What is the result of {0} + {1}?", number1, number2);
}
}

Answer 2

Thanks *-*

Answer 3

C# sorry

Answer 4

You didn't tell us which language