Y8 Python - Low Ability - If Elif JM

• Computing
• Lower Secondary (Key Stage 3)

Python

On the road to code!

What is Python Programming?

Python

• High level programming language
• Allows you to create your own programs
• Text based

KO - Learn to program with Python

• All - Use the print function to output some text on the screen
• Most - Create a variable that stores text data that can then be displayed on the screen in a story
• Some - Can explain the link between machine code and high level language

Recall

Try these old recall questions on things you should know about programming

Code that runs one line after another is known as coding in...

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

Code that repeats/loops is known as coding in...

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

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

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

An example of a loop in python would be:

1. print("this")
2. while x > 0 :
3. if x == 0 :
4. name = input("-->")

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

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

Refresh

Time to refresh those skills

outputs

Used to output messages to the screen

In Python we use print

print ("hello world")

Task 1 - Print statement

Link to Python interactive task

Link to support video

Variables

An area in memory used to store a value the program will use.

The value is likely to change

Here are some examples in Python

name = "Dave"                      - Text 

health = 100                           - Integer

discount = False                  - Boolean  (True/False)

Inputs

We often use variables to store inputs from the user

In Python we use input

input ("Question the user will see as a prompt")

So to store a name we would use:

name = input ("What is your name  ? -->  ")

KO - Learn to program with Python

• All - Use the print function to output some text on the screen
• Most - Create a variable that stores text data that can then be displayed on the screen in a story
• Some - Can explain the link between machine code and high level language

Label the correct parts of this code (drag them - text at the bottom).

filmpref = input("What kind of films do you like? ")

Checkpoint

Variable

Function

Parameters

Task 2 - Print Statements & inputs

Link to Python interactive task

Link to support video

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")

Python 

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Starter

I want you to print to the screen using Python. 

Can you print your favourite food to the screen.

KO - Learn to program with Python

• All - Use the print function to output some text on the screen
• Most - Create a variable that stores text data that can then be displayed on the screen in a story
• Some - Can explain the link between machine code and high level language

Variables

An area in memory used to store a value the program will use.

The value is likely to change

Here are some examples in Python

name = "Dave"                      - Text 

health = 100                           - Integer

discount = False                  - Boolean  (True/False)

IF/ELIF/ELSE

When we need to make a decision in a program we use a selection statement .

In Python we use if  elif  and  else

Let's look at some coded examples...

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Now Try Yourself

Task - If Statement with Elif

Click here for the task link - If / Elif - Create with Code

Video - click here for YouTube support video

In python you must write IF, ELIF and ELSE in capital letters

1. TRUE
2. FALSE

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

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

An elif part of the code will only run if the if part was not met

1. True
2. False

an if statement must always have an else component

1. True
2. False

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 :

While Loops

Sometimes you need the computer to repeat steps until a certain condition has been met

In Python we use while  and  for

Let's look at some coded examples of a while loop...

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Your Turn

Making a quiz question program

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