Form 4 - Computer
2024-2025
Floor 4 - Computer Room
Mr. Peter
While Loop & List
Santa Rosa de Lima English Secondary School
聖羅撒英文中學
Colégio de Santa Rosa de Lima - Secção Inglesa
Outline
List
1.
Explore the concept of List
How to process List in While Loop
2.
Focusing on the List processing in looping
Python List implementation
3.
Define while loop statement for List scanning
What is List?
What is List?
0
1
...
[
]
2
1
4
1
1
1
3
1
boxes =
In Python:
boxes = [ 1, 1, 1, 1, 1 ]print( boxes[ 0 ] )Get variable from List
list[ position ]
Output: 1
What is List?
0
a
"
"
2
c
4
e
1
b
3
d
text =
We can also get letter from text
text = "abcde"print( text[ 0 ] )Get letter from text
Output: a
text[ position ]
Python List Exercises
Python Nested Loops - Ex01
Multiplication Table using while Loop
1.
Save your file as "ClassNumber_YourName_Ex01.py"
Write a Python program that prints a 10x10 multiplication table using a while loop.
2
3
Use a while loop to iterate through the numbers.
1
( The variable "i" increases from 0 to 10)
Print the multiplication table.
1 2 3 4 5 6 7 8 9
2 4 6 8 10 12 14 16 18
3 6 9 12 15 18 21 24 27
4 8 12 16 20 24 28 32 36
5 10 15 20 25 30 35 40 45
6 12 18 24 30 36 42 48 54
7 14 21 28 35 42 49 56 63
8 16 24 32 40 48 56 64 72
9 18 27 36 45 54 63 72 81 Use a while loop inside the previous loop to iterate through the numbers.
( The variable "j" increases from 0 to 10)
Python Nested Loops - Ex01
Multiplication Table using while Loop
1.
Save your file as "ClassNumber_YourName_Ex01.py"
Write a Python program that prints a 10x10 multiplication table using a while loop.
2
3
Use a while loop to iterate through the numbers.
1
( The variable "i" increases from 0 to 10)
Print the multiplication table.
1 2 3 4 5 6 7 8 9
2 4 6 8 10 12 14 16 18
3 6 9 12 15 18 21 24 27
4 8 12 16 20 24 28 32 36
5 10 15 20 25 30 35 40 45
6 12 18 24 30 36 42 48 54
7 14 21 28 35 42 49 56 63
8 16 24 32 40 48 56 64 72
9 18 27 36 45 54 63 72 81 Use a while loop inside the previous loop to iterate through the numbers.
( The variable "j" increases from 0 to 10)
Python Nested Loops - Ex02
String Subtraction
1.
Save your file as "ClassNumber_YourName_Ex02.py"
Write a Python program that removes all characters from one string that appear in another string.
Python Output Result
Result: "he"str1 = "hello"
str2 = "world"Python Nested Loops - Ex03
Narcissistic number
1.
Save your file as "ClassNumber_YourName_Ex02.py"
A Narcissistic number (also known as an Armstrong number) is a number that is equal to the sum of its own digits each raised to the power of the number of digits in the number. Write a Python program that lists all the Narcissistic numbers from 100 to 999.
Iterate through the numbers from 100 to 999.
1
Check if a number is Narcissistic.
2
Print each Narcissistic number as it is found.
3
Print a descriptive message if no Narcissistic numbers are found in the range.
4
153 → 1³ + 5³ + 3³ = 153 (3-digit example)
370 → 3³ + 7³ + 0³ = 370 (3-digit example)
371 → 3³ + 7³ + 1³ = 371 (3-digit example)
407 → 4³ + 0³ + 7³ = 407 (3-digit example)
1634 → 1⁴ + 6⁴ + 3⁴ + 4⁴ = 1634 (4-digit example)
8208 → 8⁴ + 2⁴ + 0⁴ + 8⁴ = 8208 (4-digit example)
9474 → 9⁴ + 4⁴ + 7⁴ + 4⁴ = 9474 (4-digit example)Output Example
5
Python Nested Loops - Ex03
Narcissistic number
1.
Save your file as "ClassNumber_YourName_Ex02.py"
A Narcissistic number (also known as an Armstrong number) is a number that is equal to the sum of its own digits each raised to the power of the number of digits in the number. Write a Python program that lists all the Narcissistic numbers from 1 to 1000.
Iterate through the numbers from 100 to 999.
1
Check if a number is Narcissistic.
2
Print each Narcissistic number as it is found.
3
Print a descriptive message if no Narcissistic numbers are found in the range.
4
153 → 1³ + 5³ + 3³ = 153 (3-digit example)
370 → 3³ + 7³ + 0³ = 370 (3-digit example)
371 → 3³ + 7³ + 1³ = 371 (3-digit example)
407 → 4³ + 0³ + 7³ = 407 (3-digit example)
1634 → 1⁴ + 6⁴ + 3⁴ + 4⁴ = 1634 (4-digit example)
8208 → 8⁴ + 2⁴ + 0⁴ + 8⁴ = 8208 (4-digit example)
9474 → 9⁴ + 4⁴ + 7⁴ + 4⁴ = 9474 (4-digit example)Output Example
5