Iterating Over an Array

In this lesson, we will look at:

Iterating over an array using `for`

The for loop is convenient when you need access by index or when the order of iteration matters.


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int[] numbers = { 1, 2, 3, 4, 5 };
for (int i = 0; i < numbers.Length; i++)
{
    Console.WriteLine(numbers[i]);
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Iterating over an array in reverse


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int[] numbers = { 1, 2, 3, 4, 5 };
for (int i = numbers.Length - 1; i >= 0; i--)
{
    Console.WriteLine(numbers[i]);
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Used when you simply need to get the values, not the index.


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int[] numbers = { 1, 2, 3, 4, 5 };
foreach (int number in numbers)
{
    Console.WriteLine(number);
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Used when the number of steps is not known in advance or the loop depends on external conditions.


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int[] numbers = { 1, 2, 3, 4, 5 };
int i = 0;
while (i < numbers.Length)
{
    Console.WriteLine(numbers[i]);
    i++;
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This loop will execute the body at least once, even if the condition is false.


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int[] numbers = { 1, 2, 3, 4, 5 };
int j = 0;
do
{
    Console.WriteLine(numbers[j]);
    j++;
}
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string[] fruits = { "Apple", "Banana", "Orange", "Kiwi" };
// Your code
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string[] fruits = { "Apple", "Banana", "Orange", "Kiwi" };
// Your code
Line 1, Char 1


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string[] fruits = { "Apple", "Banana", "Orange", "Kiwi" };
// Your code
Line 1, Char 1


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string[] fruits = { "Apple", "Banana", "Orange", "Kiwi" };
// Your code
Line 1, Char 1