Kurssisisältö

C# Basics

1. Getting Started

Why C#?C# Syntax Displaying Output Challenge: Outputting a Triangle Comments Challenge: Comments Variables Identifiers Challenge: Variable Declaration Basic Operators & Expressions Challenge: Operators

2. Dealing with Data Types

Integer Data Types Challenge: Declaring Explicitly Typed Variables Floating-Point and Double Booleans Character String Strings Challenge Basic String Formatting Challenge: String Formatting Declaring Constants Basic Type Casting Type Casting Practice Basic Type Conversion Basic Coding Practice

3. Control Structures

Comparison Operators Logical Operators Challenge: Operators Order of Operations If Statement Challenge: if Condition else Keyword Challenge: else Keyword if-else Chain Challenge: if, else-if, else switch Statement Challenge: Switch

4. Loops

for Loop Challenge: for Loop while Loop do-while Loop Challenge: do-while Loop break Statement continue Statement Challenge: break and continue

5. Arrays

What are Arrays?Challenge: Array Declaration Indexing Challenge: Indexing Multi-Dimensional Arrays Challenge: Multi-Dimensional Arrays Looping through Arrays Challenge: Array Loops

6. Methods

What are Methods?Creating and Calling Methods Challenge: Methods Creation Method Parameters Challenge: Method with Parameters Method Return Values Challenge: Return Values Local & Global Scopes Challenge: Scopes What's Next?

Order of Operations

In case there's only one operator used multiple times then the expression is evaluated from left to right.

For the examples we will use true and false literals for simplicity. In case we have a long expression like false || false || true || false, the expression will be evaluated from the left side:

main.cs


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using System;

namespace ConsoleApp
{
    internal class Program
    {
        static void Main(string[] args)
        {
			Console.WriteLine(false || false || true || false); // Output: True
        }
    }
}

The order of the logical operators is the following:

Following is a more complex example which includes multiple different operators. It will be a good code reading exercise to read and try to understand it:

main.cs


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using System;

namespace ConsoleApp
{
    internal class Program
    {
        static void Main(string[] args)
        {
			int x = 50;

			// We can store results of boolean / logical expressions in boolean variables or constants.
			bool inRange = (1 <= x) && (x <= 10) || (90 <= x) && (x <= 100);
			Console.WriteLine($"The value {x} is in the range 1-10 or 90-100: {inRange}"); // Output: False

			x = 99;
			inRange = (1 <= x) && (x <= 10) || (90 <= x) && (x <= 100);
			Console.WriteLine($"The value {x} is in the range 1-10 or 90-100: {inRange}"); // Output: True
        }
    }
}

In the above code, we have the expression (1 <= x) && (x <= 10) || (90 <= x) && (x <= 100), which checks if x is in the range 1-10 or 90-100.

Considering the order of operators, the expression will be evaluated as follows:

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Kurssisisältö

C# Basics

1. Getting Started

2. Dealing with Data Types

3. Control Structures

4. Loops

for Loop Challenge: for Loop while Loop do-while Loop Challenge: do-while Loop break Statement continue Statement Challenge: break and continue

5. Arrays

What are Arrays?Challenge: Array Declaration Indexing Challenge: Indexing Multi-Dimensional Arrays Challenge: Multi-Dimensional Arrays Looping through Arrays Challenge: Array Loops

6. Methods

Order of Operations

In case there's only one operator used multiple times then the expression is evaluated from left to right.

For the examples we will use true and false literals for simplicity. In case we have a long expression like false || false || true || false, the expression will be evaluated from the left side:

main.cs


              123456789101112
            
using System;

namespace ConsoleApp
{
    internal class Program
    {
        static void Main(string[] args)
        {
			Console.WriteLine(false || false || true || false); // Output: True
        }
    }
}

The order of the logical operators is the following:

Following is a more complex example which includes multiple different operators. It will be a good code reading exercise to read and try to understand it:

main.cs


              1234567891011121314151617181920
            
using System;

namespace ConsoleApp
{
    internal class Program
    {
        static void Main(string[] args)
        {
			int x = 50;

			// We can store results of boolean / logical expressions in boolean variables or constants.
			bool inRange = (1 <= x) && (x <= 10) || (90 <= x) && (x <= 100);
			Console.WriteLine($"The value {x} is in the range 1-10 or 90-100: {inRange}"); // Output: False

			x = 99;
			inRange = (1 <= x) && (x <= 10) || (90 <= x) && (x <= 100);
			Console.WriteLine($"The value {x} is in the range 1-10 or 90-100: {inRange}"); // Output: True
        }
    }
}

In the above code, we have the expression (1 <= x) && (x <= 10) || (90 <= x) && (x <= 100), which checks if x is in the range 1-10 or 90-100.

Considering the order of operators, the expression will be evaluated as follows:

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Kiitos palautteestasi!

Osio 3. Luku 4