In general computing, Compilation is the process of translating a high-level programming language (which is human-readable, like C++, Rust, or Java) into a low-level language (like machine code or bytecode) that a computer's processor can actually execute.
Think of a compiler as a highly sophisticated translator that converts a book written in English into a series of mathematical coordinates that a robot can use to recreate that book.
🛠️ The Phases of Compilation
Compilation isn't a single step; it’s a pipeline of specific transformations.
1. 🔍 Lexical Analysis (Scanner)
The compiler reads the source code character by character and groups them into "tokens" (keywords, operators, identifiers). It also strips out comments and whitespace.
Example: x = 5 + 3; becomes tokens like <ID, x>, <ASSIGN, =>, <INT, 5>, <PLUS, +>, <INT, 3>.
2. 🌳 Syntax Analysis (Parsing)
The compiler checks if the tokens
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