This document discusses ways to check if a number is a perfect number in Python. It defines a perfect number as one where the sum of its positive divisors (excluding the number itself) equals the number. Two methods are presented: 1) excluding the number as a factor, and 2) including it. Examples are provided testing numbers 6, 21, and 28. The document also provides sample code execution and lists prerequisites of loops and arithmetic operators. The objective is to understand if-else constructs.

1. Team Emertxe
Basic Refresher

2. Assignment 4

3. Assignment 4

4. Assignment 4
WAP to check if number is perfect or not.

5. Assignment 4
WAP to check if number is perfect or not.
Input:

6. Assignment 4
WAP to check if number is perfect or not.
Input: Read integer ‘num’

7. Assignment 4
WAP to check if number is perfect or not.
Input: Read integer ‘num’
Output:

8. Assignment 4
WAP to check if number is perfect or not.
Input: Read integer ‘num’
Output: Print the entered ‘num’ is a perfect number or
not.

9. Assignment 4
What is a Perfect number?

10. Assignment 4
What is a Perfect number?
⮚ A number that is equal to sum of its proper positive
divisors(factors).

11. Assignment 4
There are two methods to find the given number is
Perfect or not:

12. Assignment 4
There are two methods to find the given number is
Perfect or not:
1) Excluding the given number as a factor

13. Assignment 4
There are two methods to find the given number is
Perfect or not:
1) Excluding the given number as a factor
2) Including the given number as a factor

14. Assignment 4
Method 1: Excluding the given number as a factor

15. Assignment 4
Example’s:

16. Assignment 4
Example’s:
⮚Input:

17. Assignment 4
Example’s:
⮚Input: num = 6

18. Assignment 4
Example’s:
⮚Input: num = 6
Factors of 6 are: 1, 2, 3

19. Assignment 4
Example’s:
⮚Input: num = 6
Factors of 6 are: 1, 2, 3
Sum of factors = 1+2+3 = 6

20. Assignment 4
Example’s:
⮚Input: num = 6
Factors of 6 are: 1, 2, 3
Sum of factors = 1+2+3 = 6
Is sum == num?

21. Assignment 4
Example’s:
⮚Input: num = 6
Factors of 6 are: 1, 2, 3
Sum of factors = 1+2+3 = 6
Is sum == num?
Output: Yes, 6 is a perfect number

22. Assignment 4
Example’s:
⮚Input: num = 21

23. Assignment 4
Example’s:
⮚Input: num = 21
Factors of 21 are: 1, 3, 7

24. Assignment 4
Example’s:
⮚Input: num = 21
Factors of 21 are: 1, 3, 7
Sum of factors = 1+3+7 =11

25. Assignment 4
Example’s:
⮚Input: num = 21
Factors of 21 are: 1, 3, 7
Sum of factors = 1+3+7 =11
Is sum == num?

26. Assignment 4
Example’s:
⮚Input: num = 21
Factors of 21 are: 1, 3, 7
Sum of factors = 1+3+7 =11
Is sum == num?
Output: No, 21 is not a perfect number

27. Assignment 4
Example’s:
⮚Input: num = 28

28. Assignment 4
Example’s:
⮚Input: num = 28
Factors of 28 are: 1, 2, 4, 7, 14

29. Assignment 4
Example’s:
⮚Input: num = 28
Factors of 28 are: 1, 2, 4, 7, 14
Sum of factors = 1+2+4+7+14 = 28

30. Assignment 4
Example’s:
⮚Input: num = 28
Factors of 28 are: 1, 2, 4, 7, 14
Sum of factors = 1+2+4+7+14 = 28
Is sum == num?

31. Assignment 4
Example’s:
⮚Input: num = 28
Factors of 28 are: 1, 2, 4, 7, 14
Sum of factors = 1+2+4+7+14 = 28
Is sum == num?
Output: Yes, 28 is a perfect number

32. Assignment 4
Method 2: Including the given number as a factor

33. Assignment 4
Example’s:

34. Assignment 4
Example’s:
⮚Input: num = 21

35. Assignment 4
Example’s:
⮚Input: num = 21
Factors of 21 are: 1, 3, 7, 21

36. Assignment 4
Example’s:
⮚Input: num = 21
Factors of 21 are: 1, 3, 7, 21
Sum of factors/2 = (1+3+7+21)/2 = 32/2 = 16

37. Assignment 4
Example’s:
⮚Input: num = 21
Factors of 21 are: 1, 3, 7, 21
Sum of factors/2 = (1+3+7+21)/2 = 32/2 = 16
Is sum == num?

38. Assignment 4
Example’s:
⮚Input: num = 21
Factors of 21 are: 1, 3, 7, 21
Sum of factors/2 = (1+3+7+21)/2 = 32/2 = 16
Is sum == num?
Output: No, 21 is not a perfect number

39. Assignment 4
Example’s:
⮚Input: num = 28

40. Assignment 4
Example’s:
⮚Input: num = 28
Factors of 28 are: 1, 2, 4, 7, 14, 28

41. Assignment 4
Example’s:
⮚Input: num = 28
Factors of 28 are: 1, 2, 4, 7, 14, 28
Sum of factors/2 = (1+2+4+7+14+28)/2 = 56/2 = 28

42. Assignment 4
Example’s:
⮚Input: num = 28
Factors of 28 are: 1, 2, 4, 7, 14, 28
Sum of factors/2 = (1+2+4+7+14+28)/2 = 56/2 = 28
Is sum == num?

43. Assignment 4
Example’s:
⮚Input: num = 28
Factors of 28 are: 1, 2, 4, 7, 14, 28
Sum of factors/2 = (1+2+4+7+14+28)/2 = 56/2 = 28
Is sum == num?
Output: Yes, 28 is a perfect number

44. Sample execution:-
Assignment 4

45. Sample execution:-
Assignment 4

46. Sample execution:-
Assignment 4

47. Sample execution:-
Assignment 4

48. Assignment 4
Pre-requisites:-

49. Assignment 4
Pre-requisites:-
⮚Loops

50. Assignment 4
Pre-requisites:-
⮚Loops
⮚Arithmetic operators

51. Assignment 4
Pre-requisites:-
⮚Loops
⮚Arithmetic operators
Objective:-

52. Assignment 4
Pre-requisites:-
⮚Loops
⮚Arithmetic operators
Objective:-
⮚To understand the concept of If-else constructs

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