Convert a positive decimal number to a binary number

• Make variables called:

  • original and set its value to the input number given by the end user.
  • decimal_value and set its value to original (this is so we can still use the original number later)
  • bit_value and set its value to 1. Find the smallest bit value which is larger than the decimal_number by doubling value of bit_value while it is smaller or equal to decimal_number.
  • binary_number is a string variable and stores the binary cards needed (‘1’ for dots showing and ‘0’ for not showing).

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

• Now divide the bit_value by 2 and check if decimal_number is greater than or equal to bit_value. If it is, add ‘1’ to the string binary_number and subtract bit_value from decimal_number. If not, add ‘0’ to the string binary_number. Repeat while bit_value is greater than 1. Display the value of binary_number as the output.

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")