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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
123456789101112using 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
123456789101112using 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($"Number: {number}"); } } } }
Summary
In this chapter, we explored two primary methods for iterating over arrays in C#: the for loop and the foreach loop. The for loop is versatile, allowing you to access and modify elements using their indices. The foreach loop offers a more straightforward syntax for read-only operations, enhancing code readability. Both loops are essential tools for efficient array manipulation.
1. What is the main advantage of using a foreach loop over a for loop in C#?
2. Which of the following is a correct for loop syntax for iterating over an array in C#?
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Looping through arrays is a fundamental concept in programming, allowing you to perform operations on each element efficiently. In C#, the for loop is commonly used for this purpose. Here's the syntax:
for (int i = 0; i < array.Length; i++) {
// Access array[i]
}
This loop iterates over each element using the index i, which ranges from 0 to array.Length - 1.
main.cs
123456789101112using System; namespace ConsoleApp { internal class Program { static void Main(string[] args) { int[] numbers = { 5, 10, 15, 20, 25 }; for (int i = 0; i < numbers.Length; i++) { Console.WriteLine(numbers[i]); } } } }
The foreach loop provides a simpler syntax for iterating over arrays, especially when you don't need to modify the elements:
foreach (int number in array) {
// Use number
}
This loop automatically iterates over each element, making it easier to read and write.
main.cs
123456789101112using System; namespace ConsoleApp { internal class Program { static void Main(string[] args) { int[] numbers = { 5, 10, 15, 20, 25 }; foreach (int number in numbers) { Console.WriteLine($"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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