Unit 1 - Lesson 12 - Predefined Functions

19/08/2025 11 min Temporada 1 Episodio 13
Unit 1 - Lesson 12 - Predefined Functions

Listen "Unit 1 - Lesson 12 - Predefined Functions"

Episode Synopsis

Welcome to this week's episode, where we're exploring Period 12: Predefined Functions! Today we're focusing on two essential types: conversion and modulus. Our goal is to help you implement predefined functions for character/ASCII conversion and modulus and understand their practical applications.Understanding the Tools 🔧We'll start by reviewing some of Python's most useful predefined functions, including ord(), chr(), int(), and the modulus operator (%). We'll discuss their utility in programming. For example, ord() and chr() are incredibly useful for tasks like input validation, converting characters to their numerical ASCII values, and even simple encryption. The modulus operator, which gives us the remainder of a division, is a go-to for tasks like determining if a number is even or odd, or for creating cyclical patterns.Hands-on Application ✍️You'll get a chance to put these functions to work. We'll guide you through typing up and testing examples for ord() and chr(). Then, we'll dive into Task 6, Problem 3 from the "Software Design and Development Booklet v1.4.pdf". This is a fun and practical exercise where you'll create a "secret message" program. You'll take a word, convert each character to its ASCII value using ord(), add 1 to each number, and then convert the new values back to characters using chr(). This will be an excellent way to see how these functions work together.Finally, we'll move on to Task 6, Problem 4, where you'll use the modulus operator (%) and int() conversions to solve another problem. This will help solidify your understanding of how these functions can be used for numerical manipulation. By the end of this episode, you'll be well-equipped to use these powerful predefined functions in your own programs.