Are you tall enough for a ride at an amusement park?
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Try
Select the button below to open the Python program in a new window. Run the program and read the lines of code to see if you can understand how it works. It will be helpful to arrange your display so that you can have this browser window on one side of the screen and the code on the other.
Watch this video to learn about the new concepts shown in the program:
Knowledge organiser
The new commands used in this program and others that may be useful. Select them below to learn more:
if, elif, else
The if command is used to branch a program execution in one of two directions depending on a condition being true or false.
if x < y:
If the value of x is less than the value of y do the commands indented underneath this command.
if x > y:
If the value of x is greater than the value of y do the commands indented underneath this command.
else:
If the condition is not met do the commands indented underneath this command instead.
Code must be indented inside if and else statements. Only one part of the code will be run, the other part will be ignored.
Investigate
Questions to think about with this program to check your understanding:
Identify a condition in the program.
Reveal answer
height > 104 is known as a condition. The outcome of a condition is either True or False.
State the two essential parts of the if selection statement and two optional parts.
Reveal answer
Two essential parts of the if command:
- A condition followed by a colon
- Indented commands to execute if the condition is true.
Two optional parts:
- An
else: - Indented commands to execute if the condition is false.
Make
Change the program so that it works for a toddler’s merry-go-round:
- The child must be under 91cm to go on the ride.
Typical inputs and outputs from the program would be:
Enter the height of the person in cm: 110
Sorry, you are too tall.
Enter the height of the person in cm: 78
Height OK.