The document discusses for loops in Python. It explains that for loops are used to iterate over sequences like lists, tuples, and strings. There are two types of for loops: 1) Getting each element of the sequence, and 2) Using the range() function to generate a sequence of numbers to use as indexes. The document provides examples of iterating over lists and strings using for loops, and using break and continue statements to control loop behavior. It also explains how to use the range() function to generate a sequence of numbers for iteration.

1. Python programming-for
loops

2. Quick revision
 What is a list?
 Difference between list and a variable
 Can list store data of multiple types?
 What is used to iterate over a list?
 How to calculate length of list?
 Are strings stored as lists in python?

3. What is for loop???
 The for loop in Python is used to iterate over
a sequence (list, tuple, string) or other
iterable objects.
 Iterating over a sequence is called traversal.

4. 2 types of writing for loops
1.Getting each element of the sequence
2.Range (): By generating range of numbers and
use these numbers as indexes to access
sequences.

5. Lets dive in type 1 of for loop

6. Syntax of for loop

7. Example

8. Flowchart of for loop

9. Iterating over string

10. Example 2:For loop to calculate sum
of elements in a list

11. The break statement
 Exit the loop when x is "banana", but this time the
break comes before the print:

12. Continue keyword
 With the continue statement we can stop the
current iteration of the loop, and continue with
the next:

13. Type 2 of for loop

14. The range() function
 We can generate a sequence of numbers using
range() function. range(10) will generate
numbers from 0 to 9 (10 numbers).
 We can also define the start, stop and step size
as range(start,stop,step size). step size defaults
to 1 if not provided.
 To force this function to output all the items, we
can use the function list().

15. Example

16. Example to use range() in for loop

17.  Syntax : range(start index, end index, step size)

18. Sample problems
 Print elements of a 1 dimensional list.
 Print elements of 2 dimensional list.
 Print even elements in a list.

19. This work is licensed under a Creative Commons
Attribution-ShareAlike 3.0 Unported License.
It makes use of the works of Mateus Machado Luna.