Learn 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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Section 5. Chapter 7

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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#?

Everything was clear?

Thanks for your feedback!

Section 5. Chapter 7

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#?

Awesome!

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#?