Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 36 - 2501_KVS_C-7
P. 36

    Activity 3.1
                        1.    Write a Python program to calculate the perimeter of a square whose side is 7 cm.

                        2.    Write a Python program to calculate the perimeter of a rectangle whose length is
                              9 cm and whose breadth is 3 cm.

                        3.    Write  a  Python  program  to  display  the  area  of  a  circle  with  radius 4 cm.
                              (Hint: area = 3.14 × radius × radius).

                        4.    Write a Python program to calculate simple interest on a principal amount of 5 000
                              for a period of 3 years at an interest rate of 5 %.

                      3.2 PYTHON PROGRAMMING – DECISION STRUCTURE

                      3.2.1 Inputting Values
                      Dear students, you learnt about programming basics and development of program in the

                      previous chapter. You know each program may consist of input, process and output. In the
                      previous chapter, programs generated output on the basis of fixed values.

                      Example 1: Program to find sum of A and B.

                      A=5
                      B=6
                      S=A+B
                      print("Sum of A and B is ", S)
                      You will get output as:   Sum of A and B is 11

                      In this example, you will always get the same output on execution of program, because the
                      values of A and B are fixed.
                      Can you give value of A and B at the time of execution of program? Yes, you can give values
                      of A and B at run-time. To input values at run-time, you use the input() function.

                      Syntax: variable = input("message")
                      Program 1: Write a program to display a message         Code:
                      received from user.                                     msg=input("Give your message:")

                      In this program, whatever message will be given         print(msg)
                      by the user will be displayed by a print statement.
                      Program 2: Write a program to input the age of a
                      person and display age increased by 2 year.                Code:

                      Always  returns a string,  but you  are trying to          age=input("Enter your age")
                      add the number 2 to it. Python raises TypeError            age=age+2

                      because  you cannot add a  string  and an integer  print(age)
                      directly.

                    34                         KVS DELHI REGION 2025

| 31 32 33 34 35 36 37 38 39 40 41 |