Turtle Graphics. Parameters. Each item of the list element gets printed line by line. 4.2. for Statements¶. Output. Loops. Let us also take a look at how range function can be used with for loop. Variables. start: (optional) The start index is an integer, and if not given, the default value is 0. The Overflow Blog Open source has a funding problem About Python Classroom. We can also use another repeat technique, Python's while loop. Syntax for iterating_var in sequence: statements(s) If a sequence contains an expression list, it is evaluated first. A range function has three parameters which are starting parameter, ending parameter and a step parameter. Syntax of the For Loop. It might sound like, we might not really need a “else” inside “for” if it only gets executed at the end of for loop iteration. This is called a generator expression.. After working through this lesson, you’ll be … Python while loop. Python lets you unpack sequences on assignment: >>> foo = ('spam', 'ham') >>> bar, baz = foo >>> bar 'spam' >>> baz 'ham' The same can be done in a for loop:. Note: In python, for loops only implements the collection-based iteration. For in loops. The for statement in Python differs a bit from what you may be used to in C or Pascal. 5. In each iteration step a loop variable is set to a value in a sequence or other data collection. a for statement is a loop because the flow of execution runs through the body (or, whatever is indented below), then loops back to the top. The above example using the while loop and prints all the elements in the output. In python, range is a Built-in function that returns a sequence. Python Curriculum Map. In Python, there is no C style for loop, i.e., for (i=0; i