diff --git a/docs/csharp/tour-of-csharp/tutorials/numbers-in-csharp.md b/docs/csharp/tour-of-csharp/tutorials/numbers-in-csharp.md index 41a12101cd0ba..d721134fc2808 100644 --- a/docs/csharp/tour-of-csharp/tutorials/numbers-in-csharp.md +++ b/docs/csharp/tour-of-csharp/tutorials/numbers-in-csharp.md @@ -251,7 +251,7 @@ You saw the basic numeric types in C#: integers and doubles. There's one other t ***Challenge*** -Now that you know the different numeric types, write code that calculates the area of a circle whose radius is 2.50 centimeters. Remember that the area of a circle is the radius squared multiplied by PI. One hint: the runtime contains a constant for PI, that you can use for that value. , like all constants declared in the `System.Math` namespace, is a `double` value. For that reason, you should use `double` instead of `decimal` values for this challenge. +Now that you know the different numeric types, write code that calculates the area of a circle whose radius is 2.50 centimeters. Remember that the area of a circle is the radius squared multiplied by pi. One hint: the runtime contains a constant for pi: . Because `Math.PI` is a `double` value, you should use `double` instead of `decimal` values for this challenge. You should get an answer between 19 and 20.