Repetition - Iteration

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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                     }
  • Do while is the same as a while, however it doesn't check until it has done one iteration.
1  do {
2      x ++
3     }
4  while (true)
An iteration is when a piece of code is repeated until a condition is reached.