Listing Even Numbers in Python

Understanding Even Numbers in Math with Python

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, ...

Considering how simple and straight-forward even numbers are, writing a Python code for even numbers serves as a great way to introduce our Mathematics educational activities for young learners.
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. Bear in mind, we use only a loop and a simple conditional statement for the Python code.

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 numbers.

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 Even Numbers - 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

Python code for Even Numbers - 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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