×

Challenges

  1. Not started

  2. Not started

  3. Not started

  4. Not started

  5. Not started

  6. Not started

  7. Not started

  8. Not started

  9. Not started

  10. Not started

  11. Not started

  12. Not started

  13. Not started

  14. Not started

  15. Not started

  16. Not started

  17. Not started

  18. Not started

  19. Not started

  20. Not started

  21. Not started

Challenge 1.2

Display Binary Numbers (using a variable)

Challenge Level: Beginner

Requirement:

Write a program to display numbers 1, 2, 4, 8 and 16 on the screen one at a time. Instead of displaying the number directly, you should store it into a variable, and display the variable.

Hints
  • Make a variable called number_of_dots and change its value by setting it to 1, 2, 4, 8 and 16 respectively. Make sure your variable name is meaningful for someone else to read. In the above example, the variable is called number_of_dots because it stores the number of dots on a card.
  • Use number_of_dots = 0 to set the value of your new variable. This code would set number_of_dots to zero.
  • The print() statement allows you to display text or values within the parentheses on the screen. For example: print(100) would display 100 on the screen.
  • You will need to use a print() statement for each number you wish to display.
Programming Reminders
# Print a string directly
print("Hello World!")

# Print a variable
print(my_var)

Variables

# Set a variable as a string
fruit_name = "Apple"

# Set a variable as an integer 
pieces_of_fruit = 7

# Set a variable from a calculation
cost_of_fruit = pieces_of_fruit * cost_per_item

# Add one to a value
pieces_of_fruit += 1

Conditionals

# Find out the discount on fruit
if pieces_of_fruit > 100:
   print("Bulk discount applies")
elif pieces_of_fruit > 5:
   print("Discount applies")
else:
   print("No discount")

For loops

# Print numbers 0-9 - remember Python starts counting from 0 
for num in range(10):
    print(num)

While loops

# Print numbers 0-9 using a while loop and a variable
num = 0
while num < 10:
    print(num)

    # Increment the variable by one.
    # It will prevent an infinite loop!
    num += 1 

Lists

# Create a list of fruit 
fruit = ["Apple", "Banana", "Orange", "Pear"]

Functions

# Create a function which prints a greeting
def greeting(name):
    print("Hello " + name)

# Call the function
greeting("Spiderman")

Enter your code in the editor below

Your results will be displayed here

Input Expected output Received output Status

                
1
2
4
8
16

                
Not yet run ?