C#: Mixing Variables with String Literals

The three examples below show you how to use variables within string literals in C#.

1. Using the $ symbol

string name = "John Doe";
int age = 99;
var output = $"{name} is {age} year old";
Console.WriteLine(output);

Output:

John Doe is 99 year old

2. Using + Operation

var a = "apple";
var b = "banana";
var c = "coconut";
Console.WriteLine("My favorite fruits are " + a + ", " + b + ", " + c + ".");

Output:

My favorite fruits are apple, banana, coconut.

3. Using String.Format

string title = "The Wonderful Game";
float price = 30.99f;
var message = string.Format("{0} costs {1}USD.", title, price);
Console.WriteLine(message);

Output:

The Wonderful Game costs 30.99USD.

Happy coding!