Perform Basic String Formatting in C#

Question

Which of the following lines of code correctly uses string interpolation assuming that the variable value is a string?

Try to answer this question first on freeCodeCamp .

Option 1

Console.WriteLine(@"My value: {value}");

The @ symbol indicates a verbatim string , which means any content inside the string is treated literally.

Output:

My value: {value}

Incorrect - this does not perform string interpolation.

Option 2

Console.WriteLine($"My value: {value}");

The $ symbol indicates this is an interpolated string . Expressions inside {} are evaluated and inserted into the string.

Assuming value = "The value", the output would be:

My value: The value

Correct - this is an example of string interpolation in C#.

Option 3

Console.WriteLine(@"My value: [value]");

Again, this is a verbatim string like in option 1. The brackets [] are not used for interpolation in C#. Everything inside is printed exactly as written.

Output:

My value: [value]

Incorrect – this does not use interpolation.