Constants by Language

Every language has its own approach to defining and using constants. Choose your language to learn the syntax, idiomatic patterns, and built-in constants.

JavaScript / TypeScript

const, Object.freeze, and built-in constants

Python

Constants by convention, typing.Final, and enum

Go

const keyword, iota, and typed constants

Rust

const, static, and compile-time evaluation

Java

static final, enums, and immutable collections