An iterative equation is one were the answer is re-entered into the equation to gain the next result. ‘Iterations’ refer to the number of times an equation is run. If an equation is run ten times then it has been through ten iterations.
Example: xnext = x + 3, x0 = 0
| Iterations | Result |
| 1 | xnext = 0 + 3 therefore x = 3 |
| 2 | xnext = 3 + 3 therefore x = 6 |
| 3 | xnext = 6 + 3 therefore x = 9 |