Form 4 - Computer

2024-2025

Floor 4 - Computer Room

Mr. Peter, Mr. Jon

While Loops

Santa Rosa de Lima English Secondary School

聖羅撒英文中學

Colégio de Santa Rosa de Lima - Secção Inglesa

Outline

What is While Loop in Python

Review the concept of While Loop in Python

How Looping works in Python

Focusing on the syntax of While Statement

Python While Loop Statement implementation

Define while loop statement for requirements

What is While Loops?

What is While Loops in Python?

A piece of code in Python

What is While Loops in Python?

Code Start

What is While Loops in Python?

Code Start

Code End

What is While Loops in Python?

Code Start

Code End

Condition

What is While Loops in Python?

Code Start

Code End

Condition

IF True

What is While Loops in Python?

Code Start

Code End

Condition

IF True

Otherwise

While Loops Statement in Python

Tab

while Condition :

Command1

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

Start Number

Define the condition for reaching the end

Specify the increment for each loop

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

Start Number

Define the condition for reaching the end

Specify the increment for each loop

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

_______

i < 3

_______

Output

_______

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

_______

i < 3

_______

Output

_______

True

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

_______

i < 3

_______

Output

_______

True

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

_______

i < 3

_______

Output

_______

True

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

_______

i < 3

_______

Output

_______

True

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

_______

i < 3

_______

Output

_______

True

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

_______

i < 3

_______

Output

_______

True

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

_______

i < 3

_______

Output

_______

True

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

_______

i < 3

_______

Output

_______

True

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

_______

i < 3

_______

Output

_______

True

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

_______

i < 3

_______

Output

_______

True

False

While Loops Statement in Python

while i < 3 :

Tab

i = 0

print(i)

i = i + 1

_______

i < 3

_______

Output

_______

True

False

End

While Loop Statement in Python

i = 2

while i <= 5:
	print( i )
    i = i + 1

Please determine the output of the following While statement:

2, 3, 4, 5

While Loop Statement in Python

i = 1

while i < 3:
	print( i )
	i = i + 2

Please determine the output of the following While statement:

1

While Loop Statement in Python

i = 4

while i != 0:
    print( i )
    i = i - 2

Please determine the output of the following While statement:

4, 2

While Loop Statement in Python

i = 1

while i < 1 or i > 1:
    print( i )
    i = i - 2

Please determine the output of the following While statement:

Nothing

Python While Loop Statement Exercises

Python While Loop Exercises - Ex01

Ex01 Demo

Please create a python question that ask student to write a python program which allow user to input a increment for each while loop from 1 to 100

1. Save your file as "ClassNumber_YourName_Ex01.py"

increment = int( input( 'Enter a positive increment value: ' ) )

Prompt the user to input a positive integer to use as the increment.

Ensure the input is a positive integer. If not, display an error message and prompt again.

Use a while loop to iterate from 1 to 100, incrementing by the user's input.

Print each number generated by the loop.

Python While Loop Exercises - Ex01

Ex01 Demo

Please create a python question that ask student to write a python program which allow user to input a increment for each while loop from 1 to 100

1. Save your file as "ClassNumber_YourName_Ex01.py"

increment = int( input( 'Enter a positive increment value: ' ) )

Prompt the user to input a positive integer to use as the increment.

Ensure the input is a positive integer. If not, display an error message and prompt again.

Use a while loop to iterate from 1 to 100, incrementing by the user's input.

Print each number generated by the loop.

Python While Loop Exercises - Ex01

Please create a python question that ask student to write a python program which allow user to input a increment for each while loop from 1 to 100

1. Save your file as "ClassNumber_YourName_Ex01.py"

increment = int( input( 'Enter a positive increment value: ' ) )

Prompt the user to input a positive integer to use as the increment.

Ensure the input is a positive integer. If not, display an error message and prompt again.

Use a while loop to iterate from 1 to 100, incrementing by the user's input.

Print each number generated by the loop.

Python While Loop Exercises - Ex02

Ex02 Demo

Write a Python program that allows the user to input a number to be used as an increment or decrement in two while loops. The first loop should start at 1 and continue until it reaches or exceeds 100. The second loop should start at 100 and continue until it reaches or goes below 1. The program should print each value in both loops.

1. Save your file as "ClassNumber_YourName_Ex01.py"

steps = int( input( 'Enter a positive increment/decrement value: ' ) )

Prompt the user to input a positive integer for incrementing from 1 to 100.

Use the same value for decrementing from 100 to 1.

Ensure the input is a positive integer. If not, display an error message and prompt again.

Use while loops to iterate and print values.

Python While Loop Exercises - Ex02

Ex02 Demo

Write a Python program that allows the user to input a number to be used as an increment or decrement in two while loops. The first loop should start at 1 and continue until it reaches or exceeds 100. The second loop should start at 100 and continue until it reaches or goes below 1. The program should print each value in both loops.

1. Save your file as "ClassNumber_YourName_Ex02.py"

steps = int( input( 'Enter a positive increment/decrement value: ' ) )

Prompt the user to input a positive integer for incrementing from 1 to 100.

Use the same value for decrementing from 100 to 1.

Ensure the input is a positive integer. If not, display an error message and prompt again.

Use while loops to iterate and print values.

Python While Loop Exercises - Ex02

Write a Python program that allows the user to input a number to be used as an increment or decrement in two while loops. The first loop should start at 1 and continue until it reaches or exceeds 100. The second loop should start at 100 and continue until it reaches or goes below 1. The program should print each value in both loops.

1. Save your file as "ClassNumber_YourName_Ex02.py"

steps = int( input( 'Enter a positive increment/decrement value: ' ) )