Python 3: Iteration

For students with some prior experience of using simple For and While loops, this intermediate-level resource explores how they can be used for more complex coding while maintaining efficiency.

Exercises include arithmetic applications of While loops, and development of simple For loops to be usable in more flexible ways. Use of Break in For and While loops is covered, and Else is used for conditionally branching code. Guidance is included for using In with For loops, to iterate over items in a list.

Functions that check data validity are introduced in code that generates error messages, and are combined with the Continue function to build more robust programs.

Some simple tutorials and exercises using Range () include conversions to lists and printing values, as well as stepping through ranges using positive and negative numbers. The reversed() function is applied to ranges, too, as are a selection of other functions that can be used with ranges, lists and strings.