Part One: Theoretical Foundation 1.1 What is a Programming Language? Simple Understanding: A programming language is like a language we use to communicate with computers. Just as you chat with friends in Chinese or English, we use programming languages to tell computers what to do. Features of Python: • Easy to Learn: The syntax is … Read more
Types of variables used in Huichuan PLC programming In Huichuan PLC programming, the variety of variables is quite rich. Similar to other brands of PLCs, it generally includes soft components, custom variables, and system variables. Soft components typically include: bit soft components X/Y/M/S/B, and sub soft components D/R/W. It is not difficult to see that … Read more
🐍 Journey of a Python Beginner · Lesson 1 (Part 1) | Python Basics: Expressions, Variables, and the First Program Hello everyone, I am Xingyuan, a 19-year-old programming novice self-learning Python 🤓. This is my Learning Notes Series, where I will organize and share the knowledge points I learn every day with fellow learners on … Read more
Click the blue text to follow us The core goal of learning on the second day is to enable the code to have judgment and repetition capabilities. Building on the foundation from the first day (previous notes), we will expand the practicality of the code while reinforcing the knowledge already learned. Below is the modular … Read more
How to save data in Python? How to choose data types? What conditions should be used to make the program make automatic judgments? Don’t worry, today we will start with the basic concepts of “variables”, “data types”, and “conditional statements” to unlock the first step of Python programming in the most relatable way! These seemingly … Read more
For shell, there are both environment variables and local variables, which are explained as follows. Environment Variables: These are variables created during system startup, primarily those created by rootfs to serve the system, and can also include variables imported by users through commands like export. Environment variables can be used in all shell interactive environments … Read more
1. Keywords in C Language In C language, keywords are part of the programming language that have special meanings, used to inform the compiler about the structure and control flow of the program. Keywords are predefined words that cannot be used to name variables, functions, or any other identifiers. Common keywords include: <span>int:</span> Defines a … Read more
<Variables, Constants, and Data Types>From novice to expert, from Hello World to ACMAll practical content, no textbooks required! 1. Definition and Use of Variables and Constants What is a variable? Imagine a storage box: a variable is a “storage box” in memory used to hold data. Variable definition syntax: data_type variable_name; Example: int age; // … Read more
🧩 1. Basic Structure of a C Program In the previous article, we have installed the Dev-C++ compilation environment. Today, we will write our first truly “interactive” C program—communicating with the user through input (scanf) and output (printf). A simple C program looks like this👇 #include <stdio.h> // Include standard input-output library int main() { … Read more
Simple Variables Programs need to store information, and variables are the basic units for storing information. When declaring a variable, three basic attributes must be specified: storage location, stored value, and data type. Basic Concepts #include <iostream> using namespace std; int main() { // Variable declaration and initialization int braincount; // Declare an integer variable … Read more