Iteration means a 'step'.
Each 'iteration' of something means changing by one step.
In computer programming 'iteration' is used to loop around and around a piece of code until a condition is met that ends the iteration.
FOR X=1 TO 10
The computer code above will increase X by 1 with every iteration. On each iteration a document is printed. When X reaches 10, the iteration stops.
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Iteration