Repetition - Iteration

Repetition

Repetition is the use of a for loop to execute one piece of code over and over. There are multiple ways to create a for loop though. These are:

• While uses one condition that which if met, will repeat the code.

1 while (true)
2   {
3     x ++;
4   }

• For loops intialise a variable, check a condition and perform an action. This is done before each iteration.

1 for (int i = 0; i <= 1000000; i++)
2   {
3     console.WriteLine(i);
4   }

• Do while is the same as a while, however it doesn't check until it has done one iteration.

1 do 
2   {
3     x ++;
4   }
5  while (true)

• Foreach loops can also be used to access <a href ="http://compsci.duckdns.org/mediawiki/index.php/Arrays">array variables</a>

1 foreach (int x in Arr) 
2   {
3     Console.WriteLine(x);
4   }

Iteration

An iteration is when a piece of code is repeated until a condition is reached.