Page 133 - 2622_Delhi Police Public School_C-8
P. 133

You will get the following output:

                     Output

                  A sequence of
                  characters are called a string.
                  Strings are used by programming
                  languages to manipulate text such
                  as words and sentences.




                 Using Escape Sequences with Strings

                 Escape sequences or characters are used to insert special characters that are not directly printable or
                 representable in a string in Python. They represent non-printable or special characters within strings.

                 Quotes are special characters  and to insert them in a string we must escape them with a \ character
                 in front of them.

                 An escape sequence is a sequence of characters that does not represent itself when used inside a
                 character or string. It is typically used to specify actions such as special characters and formatting
                 actions. For example, carriage returns and tab movements. The backslash (\) is a special character and

                 is also known as the escape character in Python. For example, '\t' for tab, '\n' for new line and '\r' is for
                 carriage return.


                 Program 5: To print special symbols using escape sequences

                     Program5.py
                  File  Edit  Format   Run   Options   Window    Help

                  print('I love programming in \n Python')




                 You will get the following output:

                     Output

                  I love programming in
                   Python



                 Traversing a String

                 Traversing means visiting each element and processing it as required by the program. We can access
                 the characters of a string one at a time using indexing.
                 There are two ways of indexing a string:

                    Positive Indexing: Indexing starts from the left, with the first character at index 0.
                    Negative Indexing: Indexing starts from the right, with the last character at index -1.




                                                                                   Functions and String  in Python  131
   128   129   130   131   132   133   134   135   136   137   138