Display the binary cards needed to represent any decimal number

• Make variables called:

  • original and set its value to the input number given by the end user.
  • number and set its value to original (so we can use original later)
  • bit_value and set its value to 1. Find the smallest bit value which is larger than the number by doubling value of bit_value while it is smaller than or equal to number.
  • cards is a string variable and stores the binary cards needed (‘B’ for black cards and ‘W’ for white cards).

• Set the variable bit_value to 1 and find the smallest bit_value which is larger than number by multiplying bit_value by 2 while it is smaller than or equal to number. You can do this by using a while loop.

• Now divide the bit_value by 2 and check if number is greater than or equal to bit_value. If it is, add ‘W’ to string variable cards and subtract bit_value from the number. If not, add ‘B’ to string variable cards. Repeat while bit_value is greater than 1. Display the value of cards as the output.

• Test your program with some values on the boundaries (for example test it with numbers 255 and 256).

Print statements

# 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")