I understand the result and how to execute the compiled expression but why bother doing it?
// Lambda expression as data in the form of an expression tree.`
System.Linq.Expressions.Expression<Func<int, bool>> expr = i => i < 5;
// Compile the expression tree into executable code.
Func<int, bool> deleg = expr.Compile();
// Invoke the method and print the output.
Console.WriteLine("deleg(4) = {0}", deleg(4));
/* This code produces the following output:
deleg(4) = True
*/
`