Python lesson 4

• Computing
• Lower Secondary (Key Stage 3)

Python lesson 4

Do Now: Fix the code, paste your fixed code below

Extension:

Code

https://create.withcode.uk/python/PGi

Extension Task

https://forms.office.com/e/YS6DfuWpEt

Lesson 4: Python programming

Conquer: Define the term iteration

Aspire: Use iteration in a program to form a loop. 

CORRECT

CAUSE AN ERROR

print = ("Hello")

Print("Yes!")

print("this one)

name = imput("what is your name")

name = input("what is your name")

print("this text")

fav colour = "Green"

age = 10

print("Hello", name)

print("Bye",name")

Label the correct parts of this code (drag them - text at the bottom)to create an if statement that checks if the value is greater than 20

Incorrect code

Checkpoint

Label the correct parts of this code (drag them - text at the bottom)to create an if statement that checks if the number is less than 100

Incorrect code

Checkpoint

If statement practice

Create a a program that will ask the user their favorite subject.

1. if enterprise is chosen say correct enterprise is the best
2. If PE is chosen, say we cant do that its raining 
3. if anything else is entered, say unfortunately you didn't say enterprise. 
4. Click here to code

Looping code

• Sometimes you need the computer to repeat steps until something happens (a condition being met)

• In Python we can use either while or for loops
  

• Lets look at each in turn

While loops will repeat until a condition is met

Loop task: ISL

Create 2 while loops in a program

• 1 loop will count to 100
• 1 loop will count down from 100 

Create with code

ISL Extension

1. Write a While loop that adds together all the numbers from 1 to 100.

2. Write a While loop that will repeat a question until the user gets the answer correct.  Hint - you will need to use an 'input' and an 'if'

3. Change your code from question 2, so they only get 5 attempts to answer

A value that is used by the program and can change is known as a...

1. constant
2. procedure
3. function
4. variable

Code that only runs when a condition is met is known as coding in...

1. Sequence
2. Selection
3. Iteration
4. Recursion

After every if, elif and else statement you put ...

1. ;
2. }
3. :
4. #

Which of the following if statements would cause an error

1. if name != "Fred":
2. if password == guess:
3. if name = "Bobby":
4. if age >= 18 :

Which symbol will check if two values are the same in a while condition?

1. !=
2. ==
3. =
4. "="

What would this code do when run:
x=1
while x != 10:
print(x)

1. Count to 10 on screen
2. Count to 9 on screen
3. print the value 1 over and over forever
4. produce a syntax error