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    10                            Functions and String

                                                                       in Python

                          Let’s surf

                              Functions                                    String
                              Some More Programs

                       Let’s PLug-in                                                                  Century   #Critical Thinking
                                                                                                        21 st
                                                                                                       Skills
                         Write Python code to add first five natural numbers.

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                             FUNCTIONS

                      A function is a block of organised and reusable code designed to perform a single or related set
                      of actions. Functions receive data in the form of arguments and use it to execute a specified set of
                      statements and produce an output.

                           Features of Function

                      Functions are the basis of procedural programming. Some important features of functions are:
                          A  program is  divided  into  small modules  and  each  module  performs some  specific  task.  Each
                        module can be called as per the requirement.
                          We can call a function as many times as required. This saves the programmer time and effort to

                        rewrite the same code again. Therefore, it also reduces the length of the program.
                          Dividing a bigger program into smaller functions makes the program more manageable. It makes
                        debugging easy and makes the code efficient, both in terms of time and memory.

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