DevOps Classroom notes 26/Sep/2025

Problem

• Numerology:

2899 => 2 + 8 + 9 + 9 => 28 => 2 + 8 => 10 => 1 + 0 => 1
7888 => 7 + 8 + 8 + 8 => 31 => 3 + 1 => 4

• help her getting individual digits
• Sara

Hi sara
number = 2899
result = 0
until number > 0
   digit = number % 10
   result = result + digit
   number = number // 10
   if number == 0 && result > 9
      number = result
      result = 0
say result

Programming

• We are programming at the user space
  
• Formal languages like C, C#, Java, Python etc help us in building applications/scripts by abstracting all the os level details
• We have 3 possible options in any formal languages
  • Compiler: C, C++, Golang
  • Interpreter: bash, python, Ruby
  • Hybrid: Java, C#
• When you run any application/program, OS start process. Each process will have unique id, memory and cpu shares allocated
• To deal with memory, languages offer datatypes
  • integers
  • floats
  • string
  • boolean
  • …
• Languages can be broadly classified into two types based on how they deal with datatypes
  • Statically typed languages:
    • We need to specify data type for variables
    • example: C, C++, Java, C#
  • dynamically typed languages
    • no need to be explicit, interpreter decides the type based on value passed
    • example: python, javascript, bash
• Python is interpreted & dynamically typed programming (formal) language.
• Zen of Python
• References:
  • Pythons official docs
  • Real Python
  • Beginner friendly
    • Programiz
    • W3Schools
    • Geek for Geeks
  • Books:
    • Think Python
    • Introducing python
    • Headsfirst python
• Prompt:

As an expert in python, I'm begineer in python trying to understand <topic>, Give me examples, usecases and where is it used