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    Program 3: To change the elements of a list

                       Program3.py

                    File  Edit  Format  Run   Options  Window    Help
                    list1=[13, 25, 41, 63, 82]
                    list1[1]=50
                                                                                    Output
                    list1[3]=45
                    print(list1[:])                                              [13, 50, 41, 45, 82]

                       TRAVERSING A LIST

                  Traversing means accessing or visiting the elements of a list. Two ways to traverse a list are positive
                  indexing and negative indexing.

                  Positive Indexing

                  In positive indexing, the index of elements of a list starts from from left to right which means if a list
                  contains 10 elements then its index (it is always an integer number) is from 0 to 9.

                           Factbot

                    If the user tries to access an element from a list beyond its defined range, then it will give an IndexError.

                  To access the list elements, the indexing operator or subscript operator [ ] is used.

                  Program 4: To find the elements in the list using the index value

                       Program4.py
                    File  Edit  Format  Run   Options  Window    Help

                    list1=[13, 25, 41, 63, 82]
                                                                                    Output
                    print(list1[0])                                              13
                    print(list1[3])                                              63
                    print(list1[4])                                              82

                                    Factbot

                            If  a user tries to access a list element by  using  floating-point  indexing,  it will  result in
                            IndexError.

                      146  Premium Edition-VIII

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