Structures to repeat tasks or access data collections are at the heart of compact and reusable code. C#, like other programming languages, provides three basic mechanisms allowing you to execute statements multiple times dynamically. In this course, we'll take an in-depth look at the for loop, while loop, and foreach loop.
These looping mechanisms vary in structure and intended application, and we'll examine how to use them in different scenarios. In the course of this detailed investigation, you will learn some of the potential pitfalls that accompany programming with each type of loop, how to avoid them, and create efficient loops. There are code examples demonstrating the use of each loop type in a practical way, along with other helpful C# and .NET code snippets.
- An in-depth understanding of for loops
- Learn about while loop syntax and see how they are used
- Gain a foundational understanding of object lists
- Learn how to use, and not to use, a foreach loop to iterate through a list
This course is intended for those who already have a basic understanding of C# and want to learn about loops.
To get the most out of this course, you should have a basic knowledge of C# as well as an understanding of object orientation and C# classes. Please consider taking our Introduction to Object Orientation and C# Classes course before taking this one.
Source code related to the lectures can be found here
A list is a .NET object for storing collections of other objects and is defined within the System.Collections.Generic namespace. A list doesn't exist in isolation; it has to a list of something. We can see when declaring and instantiating a list, the class of the objects to be stored in the list is enclosed in less than and greater than symbols following the keyword list.
We can have a list of a simple data type like string or a list of any arbitrarily complex data type that we have created ourselves. Like all classes in .NET, the list class has methods and properties. Items can be dynamically added to and removed from a list, as well as sorted. The count property tells us how many elements are in the list. Lists are more flexible than arrays, as you don't need to know the number of items to be stored when you create the list. The list class even has a method called ToArray to create a copy of the list as an array. This method is handy as .NET methods seldom take lists as parameters but do take arrays.
Hallam is a software architect with over 20 years experience across a wide range of industries. He began his software career as a Delphi/Interbase disciple but changed his allegiance to Microsoft with its deep and broad ecosystem. While Hallam has designed and crafted custom software utilizing web, mobile and desktop technologies, good quality reliable data is the key to a successful solution. The challenge of quickly turning data into useful information for digestion by humans and machines has led Hallam to specialize in database design and process automation. Showing customers how leverage new technology to change and improve their business processes is one of the key drivers keeping Hallam coming back to the keyboard.