Listing Even Numbers in Python

What are Even Numbers?

Hello pupils, what are even numbers?
Answer:
Even numbers are numbers that are divisible by 2.

They include:

2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ...

Well then, let's see how we can write a programming code to make our computer list a set of even numbers in the Python language, between a given range of values.

Create a new Python Class File; call it Arithmetic.py.
Create a new Python Module File; call it evenNumbers.py.

Type out the adjoining Python code that lists even numbeers.
We will see what each significant part does as we go along.

How to run Python Codes

Run the code from the cmd shell with the command: cd ~/Documents/usingMaths -- to navigate to the folder where you saved your files;
python Arithmetic.pl

Python code for evenNumbers Module File.

# Sure enough this is a module

# define a class
class EvenNumerals:

    ###
     # Our constructor.
     # @param alpha - for the start value
     # @param omega - for the end value
     ##
    def __init__(self, alpha, omega):
        self.start = alpha
        self.stop = omega
        self.result = [] # list to hold our answers

    # Returns an list of the desired set of even numbers
    def prepResult(self):
        # Loop from start to stop and rip out even numbers;
        self.i = 0
        while self.start <= self.stop:
            if self.start % 2 == 0: # modulo(%) is explained later
                self.result.append(self.start)
                self.i += 1

            self.start = self.start + 1 # increase start by 1

        return self.result

Main Class Code.

#!/usr/bin/python
from EvenNumbers import EvenNumerals

# Use the even number module/class
lower_boundary = 1
upper_boundary = 100
even_list = EvenNumerals(lower_boundary, upper_boundary)
answer = even_list.prepResult()
print("Even numbers between", lower_boundary, "and", upper_boundary, "are:\n", answer)

print("\n\n")

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