Python Lesson 5 - Recall

• Computing
• Lower Secondary (Key Stage 3)

Python

Lesson 5 - Recap

List 4 python commands words.
1 example is print

So far

We have covered

Print

Variables

If statements

Loops

Variables

Variables can store

• Text
• Numbers
• Decimals
• True or false

Recall Quiz

Try these questions on things we have covered over the past few lessons. 

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. Loop
2. If statement
3. function
4. variable

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

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

Refresh

Time to refresh those skills

Outputs

Used to output messages to the screen

In Python we use print

print ("hello world")

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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

Player_dead = 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  ? -->  ")

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

Label the correct parts of the code with the symbols.

Click the icon for more information  

This the the variable name given to a piece of information

This will allow the user to enter information that will be saved to the variable. 

This is a string, we place a question inside so the user knows which information to enter. 

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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")

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

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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 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 :