Kursusindhold

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?

Looping through Arrays

Looping through arrays is a fundamental concept in programming, allowing you to perform operations on each element efficiently. In C#, the for loop is commonly used for this purpose. Here's the syntax:

for (int i = 0; i < array.Length; i++) {
    // Access array[i]
}

This loop iterates over each element using the index i, which ranges from 0 to array.Length - 1.

main.cs


              123456789101112
            
using System;

namespace ConsoleApp {
    internal class Program {
        static void Main(string[] args) {
            int[] numbers = { 5, 10, 15, 20, 25 };
            for (int i = 0; i < numbers.Length; i++) {
                Console.WriteLine(numbers[i]);
            }
        }
    }
}

The foreach loop provides a simpler syntax for iterating over arrays, especially when you don't need to modify the elements:

foreach (int number in array) {
    // Use number
}

This loop automatically iterates over each element, making it easier to read and write.

main.cs


              123456789101112
            
using System;

namespace ConsoleApp {
    internal class Program {
        static void Main(string[] args) {
            int[] numbers = { 5, 10, 15, 20, 25 };
            foreach (int number in numbers) {
                Console.WriteLine($"Number: {number}");
            }
        }
    }
}

Summary

In this chapter, we explored two primary methods for iterating over arrays in C#: the for loop and the foreach loop. The for loop is versatile, allowing you to access and modify elements using their indices. The foreach loop offers a more straightforward syntax for read-only operations, enhancing code readability. Both loops are essential tools for efficient array manipulation.

1. What is the main advantage of using a `foreach` loop over a `for` loop in C#?

2. Which of the following is a correct `for` loop syntax for iterating over an array in C#?

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Sektion 5. Kapitel 7

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Kursusindhold

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

Looping through Arrays

for (int i = 0; i < array.Length; i++) {
    // Access array[i]
}

This loop iterates over each element using the index i, which ranges from 0 to array.Length - 1.

main.cs


              123456789101112
            
using System;

namespace ConsoleApp {
    internal class Program {
        static void Main(string[] args) {
            int[] numbers = { 5, 10, 15, 20, 25 };
            for (int i = 0; i < numbers.Length; i++) {
                Console.WriteLine(numbers[i]);
            }
        }
    }
}

The foreach loop provides a simpler syntax for iterating over arrays, especially when you don't need to modify the elements:

foreach (int number in array) {
    // Use number
}

This loop automatically iterates over each element, making it easier to read and write.

main.cs


              123456789101112
            
using System;

namespace ConsoleApp {
    internal class Program {
        static void Main(string[] args) {
            int[] numbers = { 5, 10, 15, 20, 25 };
            foreach (int number in numbers) {
                Console.WriteLine($"Number: {number}");
            }
        }
    }
}

Summary

1. What is the main advantage of using a `foreach` loop over a `for` loop in C#?

2. Which of the following is a correct `for` loop syntax for iterating over an array in C#?

Var alt klart?

Tak for dine kommentarer!

Sektion 5. Kapitel 7

C# Basics

Looping through Arrays

Summary

1. What is the main advantage of using a foreach loop over a for loop in C#?

2. Which of the following is a correct for loop syntax for iterating over an array in C#?

C# Basics

Looping through Arrays

Summary

1. What is the main advantage of using a foreach loop over a for loop in C#?

2. Which of the following is a correct for loop syntax for iterating over an array in C#?

1. What is the main advantage of using a `foreach` loop over a `for` loop in C#?

2. Which of the following is a correct `for` loop syntax for iterating over an array in C#?

1. What is the main advantage of using a `foreach` loop over a `for` loop in C#?

2. Which of the following is a correct `for` loop syntax for iterating over an array in C#?