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C# Loop Through an Array

Arrays can be traversed using loops to perform operations on each element. The most common loops used are the for loop and the foreach loop.

Key Topics

1. Using a For Loop

Example: Iterating with a For Loop

int[] numbers = { 1, 2, 3, 4, 5 };

for (int i = 0; i < numbers.Length; i++)
{
    Console.WriteLine(numbers[i]);
}

Output:

1
2
3
4
5

2. Using a Foreach Loop

Example: Iterating with a Foreach Loop

string[] colors = { "Red", "Green", "Blue" };

foreach (string color in colors)
{
    Console.WriteLine(color);
}

Output:

Red
Green
Blue

3. Comparing For and Foreach Loops

The for loop gives you access to the index, which can be useful for certain operations. The foreach loop is more concise and easier to read when you don't need the index.

Example: Using Index in a For Loop

for (int i = 0; i < colors.Length; i++)
{
    Console.WriteLine($"Index {i}: {colors[i]}");
}

Key Takeaways

  • Use a for loop when you need to work with element indices.
  • Use a foreach loop for cleaner code when indices are not needed.
  • Looping allows you to perform operations on each array element.
  • Understanding both loops enhances your ability to manipulate arrays effectively.
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