Page 193 - CSharp/C#

Expressions

With string interpolation, expressions within curly braces {} can also be evaluated. The result will
be inserted at the corresponding location within the string. For example, to calculate the maximum
of foo and bar and insert it, use Math.Max within the curly braces:

Console.WriteLine($"And the greater one is: { Math.Max(foo, bar) }");

Output:

And the greater one is: 42

Note: Any leading or trailing whitespace (including space, tab and CRLF/newline) between the
curly brace and the expression is completely ignored and not included in the output

View Demo

As another example, variables can be formatted as a currency:

Console.WriteLine($"Foo formatted as a currency to 4 decimal places: {foo:c4}");

Output:

Foo formatted as a currency to 4 decimal places: $34.0000

View Demo

Or they can be formatted as dates:

Console.WriteLine($"Today is: {DateTime.Today:dddd, MMMM dd - yyyy}");

Output:

Today is: Monday, July, 20 - 2015

View Demo

Statements with a Conditional (Ternary) Operator can also be evaluated within the interpolation.
However, these must be wrapped in parentheses, since the colon is otherwise used to indicate
formatting as shown above:

Console.WriteLine($"{(foo > bar ? "Foo is larger than bar!" : "Bar is larger than foo!")}");

Output:

Bar is larger than foo!

View Demo

https://riptutorial.com/ 139