Python Programming: An Introduction to Computer Science, 3rd Ed.
Python Programming: An Introduction to Computer Science, 3rd Ed.
3rd Edition
ISBN: 9781590282755
Author: John Zelle
Publisher: Franklin, Beedle & Associates
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Chapter 6, Problem 4PE
Program Plan Intro

Calculate the sum of first n natural numbers and sum of cubes of first n natural numbers

Program plan:

  • The function named “sumN()” is defined and inside the “sumN()”,
    • Declare and initialize the variable named “fact” and store the calculated area value in it.
    • Initialize a for loop which ranges from 1 to -1
      • Add the value of factor to fact.
      • Return the value stored in the “fact” variable.
  • The function named “sumNCubes()” is defined and inside the “sumNCubes()”,
    • Declare and initialize the variable named “cube” and store the calculated area value in it.
    • Initialize a for loop which ranges from 1 to -1
      • Multiply the value of factor with 3 and then add that value to “cube”.
      • Return the value stored in the “cube” variable.
  • In the “main()” function,
    • Generate a prompt to take the user input.
    • Call the method named “sumN()” with user input as the argument.
    • Call the method named “sumNCubes()” with user input as the argument.
  • Print the output statement and output value.
  • Call the function “main()”.

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