Learn basic programming concepts of C# such as conditional statements, loop statements, and methods.

Become an ASP.NET Core Developer

This highly interactive module begins with a simple “Hello, World!” program and proceeds to cover common concepts such as conditional statements, loop statements, and methods in C#. It also reflects upon the idea of arrays as well as the power they give to the programmer to write better code. Finally, it teaches us about exception handling in C# through interactive challenges and exercises.

C# for Programmers: A Practical Guide

## Initializing Static Arrays

An array can be declared and filled with the default value using square bracket (`[]`) initialization syntax. 
For
example, creating and initializing an array of **5** integers:

using System;

public class MainClass {

   public static void Main(String [] args)
   {
        int[] arr = { 24, 2, 13, 47, 45 };
        foreach(var item in arr)
        {
            Console.WriteLine(item.ToString());
        }
     
   }
}

### Example Explanation
In the above example, in line **7** we have an *array* `arr`. We **don't** need to specify it's size - the compiler will automatically know that it's an array of size **5**, depending on the number of values stored.

We use *indexing* to refer to the *location* of the values in an *array*. For example:
* The value **24** is present at the index **0** of the *array*. This is written as `arr[0]` = **24**. Here, by using `arr[0]` we are referring to the location of **24**.
 
* Similarly, the *index* of the value **2** in the *array* will be **1**. It'll be written `arr[1]` = **2**. 

* The *index* of the value **13** is **2** in the *array*. So `arr[2]` = **13**.

> **Note:** Indices in C# are zero-based. The indices of the array above will be **0-9** i.e. Arrays have **0** as the *first* index not **1**.


The **`new`** `int[]` portion can be omitted when declaring an array variable. This is not a *self-contained expression*, so
using it as part of a different call does not work:

# Initializing Static Arrays

An array can be declared and filled with the default value using square bracket (`[]`) initialization syntax. 
For
example, creating and initializing an array of **5** integers:

## Example Explanation
In the above example, in line **7** we have an *array* `arr`. We **don't** need to specify it's size - the compiler will automatically know that it's an array of size **5**, depending on the number of values stored.

We use *indexing* to refer to the *location* of the values in an *array*. For example:
* The value **24** is present at the index **0** of the *array*. This is written as `arr[0]` = **24**. Here, by using `arr[0]` we are referring to the location of **24**.
 
* Similarly, the *index* of the value **2** in the *array* will be **1**. It'll be written `arr[1]` = **2**. 

* The *index* of the value **13** is **2** in the *array*. So `arr[2]` = **13**.

> **Note:** Indices in C# are zero-based. The indices of the array above will be **0-9** i.e. Arrays have **0** as the *first* index not **1**.


The **`new`** `int[]` portion can be omitted when declaring an array variable. This is not a *self-contained expression*, so
using it as part of a different call does not work:

This lesson covers initializing static, dynamic and implicitly typed arrays.

Introduction to C#

Variables and Casting

Operators

Conditions

Loops

Arrays

Methods

Exception Handling

Conclusion

Initializing Arrays

Initializing Static Arrays

Example Explanation