Python KPRIDE: Nested if

Last updated 9 months ago

6 questions

Learning Objectives:
I can use if elif and else
I know that an if statement can be inside another if statement
I know how to add indents and look for bugs 

Python KPRIDE: Nested if

Last updated 9 months ago

6 questions

For GCSE, you must know the following for programming:
Outputs and Inputs
Variables
Maths Operators
Random numbers 
Strings and Casting 
Booleans 
If, elif, else 
Nested Ifs 
For loops 
While loops 
Nested loops
 Arrays/Lists 
2D Lists
File handling 
Subprograms(functions/procedures)

Warm-up Practice:
https://type.withcode.uk/python/Conditional_logic

Learning Objectives:
I can use if elif and else
I know that an if statement can be inside another if statement
I know how to add indents and look for bugs 

Keywords
Condition: a value is checked to return True or Flase
Selection: A condition is used to see which lines of code, if any, will run.
Indentent: Spaces given to code
if statement: Runs code that is indendented when a condition is met.
elif statement: Stands for "Else If".  Is used as another question if the if statement is not met.
else statement: Runs this code when the if condition is not met.
Nested if: An if statement inside another if statement

NOTE: 
IF Elif and Else are known as Selection in programming. Selection uses a condition to allow branching code. This links to the Boolean lesson.

We can have many if statements one after another.
elif and else can't exist by itself, it has to have an if statement to belong to. You can also have many elif statements, but only one else.

Predict and Run
Look at the code for each question.
What do you think will be the output?
What is the actual output?


Code in each part of if and else is INDENTED to show it belongs

Investigate
Look at the code on the right.
Run it and see what it does.
Click on the pencil icon at the top to see the code again.

FIRST EXAMPLE:
Run the program and see what it does
Can you add your own elif statement on line12?
Second Example:
Run the program. What does this do? 
Can you add your own question into this animal guesser?
A popular version of this program is quite popular called Akinator. Can you add more to make it better?

Debug
Click on each link and try dragging and dropping code into the correct order
https://7strikelink7.github.io/NormalPythonParsons/parsons/NestedIf.html

Extend
Help:
print ( )    is used to output text 
input( )    is used to get the user to type something

Variables store values that can change.
Name = Value here

https://www.w3schools.com/python/python_conditions.asp

RECAP
Boolean: a data type that can hold one of two values (true or false)
> Symbol: Greater than
< Symbol: Less than
== Symbol: Compares if both values are the same
!= Symbol: Not equal to
>= Symbol: Greater than or equal to
<= Symbol: Less than or equal to

   Selection - 

         if         (condition)      :
   (indent)   program here....

       
   
   

Python KPRIDE: Nested if

Learning Objectives:

Python KPRIDE: Nested if

For GCSE, you must know the following for programming:

Learning Objectives:

Keywords

Predict and Run

Investigate

Debug

Extend

For GCSE, you must know the following for programming:

Keywords

Predict and Run

What will be the output for the following code if you input "y"?

myAnswer = input("Do you want a twix? y/n")

if myAnswer == "y":
print("Here is a twix")
else:
myAnswer = input("How about a Mars Bar?")
if myAnswer == "y":
print("Here is a Mars Bar.")
else:
print("Okay... have a bounty bar then.")

Investigate

Debug

Extend

Create a program that asks the user to enter a name.
If the name is "Harry", output "Which Harry? What is your last name? "

Then ask for their last name.
If they enter "Styles" output "I love your songs!"
If they enter "Potter" output "The boy who lives!"
Anything else, output "Nice to meet you!"

Create a program for the start of a videogame -
Askthe user to enter a username for the game.
Ask them "[Name]. Are you sure?".
If they input "yes" Output "Starting game".
Else, "Too bad, you are stuck with the name [name]"

What will be the output for the following code if you input "y"?

myAnswer = input("Do you want a twix? y/n")

if myAnswer == "y":
print("Here is a twix")
else:
myAnswer = input("How about a Mars Bar?")
if myAnswer == "y":
print("Here is a Mars Bar.")
else:
print("Okay... have a bounty bar then.")

Create a program that asks the user to enter a name.
If the name is "Harry", output "Which Harry? What is your last name? "

Then ask for their last name.
If they enter "Styles" output "I love your songs!"
If they enter "Potter" output "The boy who lives!"
Anything else, output "Nice to meet you!"

Create a program for the start of a videogame -
Askthe user to enter a username for the game.
Ask them "[Name]. Are you sure?".
If they input "yes" Output "Starting game".
Else, "Too bad, you are stuck with the name [name]"

Python KPRIDE: Nested if

Learning Objectives:

Python KPRIDE: Nested if

For GCSE, you must know the following for programming:

Learning Objectives:

Keywords

Predict and Run

Investigate

Debug

Extend

For GCSE, you must know the following for programming:

Keywords

Predict and Run

What will be the output for the following code if you input "y"?myAnswer = input("Do you want a twix? y/n")if myAnswer == "y": print("Here is a twix")else: myAnswer = input("How about a Mars Bar?") if myAnswer == "y": print("Here is a Mars Bar.") else: print("Okay... have a bounty bar then.")

Investigate

Debug

Extend

Create a program that asks the user to enter a name.If the name is "Harry", output "Which Harry? What is your last name? "Then ask for their last name.If they enter "Styles" output "I love your songs!"If they enter "Potter" output "The boy who lives!"Anything else, output "Nice to meet you!"

Create a program for the start of a videogame - Askthe user to enter a username for the game. Ask them "[Name]. Are you sure?". If they input "yes" Output "Starting game". Else, "Too bad, you are stuck with the name [name]"

What will be the output for the following code if you input "y"?myAnswer = input("Do you want a twix? y/n")if myAnswer == "y": print("Here is a twix")else: myAnswer = input("How about a Mars Bar?") if myAnswer == "y": print("Here is a Mars Bar.") else: print("Okay... have a bounty bar then.")

Create a program that asks the user to enter a name.If the name is "Harry", output "Which Harry? What is your last name? "Then ask for their last name.If they enter "Styles" output "I love your songs!"If they enter "Potter" output "The boy who lives!"Anything else, output "Nice to meet you!"

Create a program for the start of a videogame - Askthe user to enter a username for the game. Ask them "[Name]. Are you sure?". If they input "yes" Output "Starting game". Else, "Too bad, you are stuck with the name [name]"

What will be the output for the following code if you input "y"?

myAnswer = input("Do you want a twix? y/n")

if myAnswer == "y":
print("Here is a twix")
else:
myAnswer = input("How about a Mars Bar?")
if myAnswer == "y":
print("Here is a Mars Bar.")
else:
print("Okay... have a bounty bar then.")

Create a program that asks the user to enter a name.
If the name is "Harry", output "Which Harry? What is your last name? "

Then ask for their last name.
If they enter "Styles" output "I love your songs!"
If they enter "Potter" output "The boy who lives!"
Anything else, output "Nice to meet you!"

Create a program for the start of a videogame -
Askthe user to enter a username for the game.
Ask them "[Name]. Are you sure?".
If they input "yes" Output "Starting game".
Else, "Too bad, you are stuck with the name [name]"

What will be the output for the following code if you input "y"?

myAnswer = input("Do you want a twix? y/n")

if myAnswer == "y":
print("Here is a twix")
else:
myAnswer = input("How about a Mars Bar?")
if myAnswer == "y":
print("Here is a Mars Bar.")
else:
print("Okay... have a bounty bar then.")

Create a program that asks the user to enter a name.
If the name is "Harry", output "Which Harry? What is your last name? "

Then ask for their last name.
If they enter "Styles" output "I love your songs!"
If they enter "Potter" output "The boy who lives!"
Anything else, output "Nice to meet you!"

Create a program for the start of a videogame -
Askthe user to enter a username for the game.
Ask them "[Name]. Are you sure?".
If they input "yes" Output "Starting game".
Else, "Too bad, you are stuck with the name [name]"