Loop In C# | Chapter 7

C# Looping

For Loop

The for loop is used when you know in advance how many times you want to execute a statement or a block of statements.

Example: For Loop

1
2
3
4

for (int i = 0; i < 5; i++)
{
    Console.WriteLine(i);
}

Explanation

1. Initialization: int i = 0 sets the starting point of the loop.
2. Condition: i < 5 determines how long the loop will run.
3. Iteration: i++ updates the loop counter after each iteration.

Output

While Loop

The while loop executes a block of code as long as a specified condition is true. It is useful when the number of iterations is not known in advance.

Example: While Loop

1
2
3
4
5
6

int count = 0;
while (count < 5)
{
    Console.WriteLine(count);
    count++;
}

Explanation

1. Condition: count < 5 is checked before each iteration.
2. Body: Console.WriteLine(count) and count++ are executed as long as the condition is true.

Output

Do-While Loop

The do-while loop is similar to the while loop, but it guarantees that the loop body is executed at least once.

Example: Do-While Loop

1
2
3
4
5
6

int value = 0;
do
{
    Console.WriteLine(value);
    value++;
} while (value < 0);

Explanation

1. Body: Console.WriteLine(value) and value++ are executed first.
2. Condition: value < 0 is checked after the loop body is executed.

Output

Foreach Loop

The foreach loop iterates over a collection or array ( We will talk about array in next chapter). It is useful when you want to iterate over each element without worrying about the index.

Example: Foreach Loop

1
2
3
4
5

int[] numbers = { 1, 2, 3, 4, 5 };
foreach (int number in numbers)
{
    Console.WriteLine(number);
}

Explanation

1. Collection: int[] numbers = { 1, 2, 3, 4, 5 } is the array to iterate over.
2. Body: Console.WriteLine(number) is executed for each element in the array.

Output

Previous Chapter If Else

Next Chapter function