However, the C# compiler detects when foreach is used with an array and performs code optimizations to bring the performance of the foreach statement more in line with the performance of a for loop.Ĭonsole.WriteLine('Enter path, or to quit.') (An example demonstrating the implementation of a foreach-friendly collection will be presented in Chapter 8.) The use of these iteration methods impacts performance slightly, and you can often write a faster loop by using a for loop. If you create your own collection classes, you must implement specific methods that will be used to iterate over your collection.

The foreach loop can be used with any of the built-in collection types in the. After the decimal values for all command-line parameters are combined, the average is calculated and displayed by calling Console.WriteLine. In this example, a foreach loop is used to visit each element in the array of command-line arguments and the Convert.ToDecimal method is used to convert each of the arguments to a decimal value.

Unlike the standard behavior in C and C++ applications, the name of the application isn’t passed as the first argument the array contains only parameters passed on the command line. Console.WriteLine('Average is ', average) Ĭommand-line arguments for C# applications are passed as an array of strings, with the first argument passed as the first array element, the second argument passed as the second array element, and so on.

For loop visual basic