For loop

A for loop is an iteration structure in code which allows us to loop through a code block and easily increment a variable each time.

It is a form of definite iteration, or count-controlled iteration.

Example

In the below C Sharp code, we loop through the numbers 1-5 and print each number to the console:

for (int i = 1; i <= 5; i++)
{
    Console.WriteLine(i);
}

Iterating a collection

If you instead want to loop over a collection, you can either use a regular for loop and iterate over each index of the collection, or you can use a for each loop to iterate over the elements themselves.

See: For each loop