Kursinnhold

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?

Floating-Point and Double

Floating point numbers, also called floats, represent decimal numbers. We can declare a variable of type float using the float keyword:

main.cs


              1
            
float myVariable = 3.14f;

The letter 'f' in the value 3.14f tells the compiler that the value is of type float. Values of the float datatype should always be represented in this format.

The float data type has a limited precision so it can only store 6 to 9 digits after the decimal. There is another datatype called double which offers a higher precision:

main.cs


              12345
            
float myVar1 = 3.1415926535897f;
double myVar2 = 3.1415926535897;

Console.WriteLine(myVar1); // Output: 3.1415927
Console.WriteLine(myVar2); // Output: 3.1415926535897

As float has a lower precision, the value 3.1415926535897 is automatically rounded off till its 7th decimal digit and the result is stored in the variable myVar1.

Like int and long, we can also perform arithmetic operations on float and double values.

main.cs


              12345
            
float var1 = 1.14f;
double var2 = 1.00;
float var3 = 1.0f;

double var4 = var1 + var2 + var3;

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Seksjon 2. Kapittel 3

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Kursinnhold

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

Floating-Point and Double

Floating point numbers, also called floats, represent decimal numbers. We can declare a variable of type float using the float keyword:

main.cs


              1
            
float myVariable = 3.14f;

The letter 'f' in the value 3.14f tells the compiler that the value is of type float. Values of the float datatype should always be represented in this format.

The float data type has a limited precision so it can only store 6 to 9 digits after the decimal. There is another datatype called double which offers a higher precision:

main.cs


              12345
            
float myVar1 = 3.1415926535897f;
double myVar2 = 3.1415926535897;

Console.WriteLine(myVar1); // Output: 3.1415927
Console.WriteLine(myVar2); // Output: 3.1415926535897

As float has a lower precision, the value 3.1415926535897 is automatically rounded off till its 7th decimal digit and the result is stored in the variable myVar1.

Like int and long, we can also perform arithmetic operations on float and double values.

main.cs


              12345
            
float var1 = 1.14f;
double var2 = 1.00;
float var3 = 1.0f;

double var4 = var1 + var2 + var3;

Alt var klart?

Takk for tilbakemeldingene dine!

Seksjon 2. Kapittel 3