constants.md

Constants in TechScript

Constants are read-only identifiers whose values cannot change after they are defined.

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🔒 Declaration

Use the const keyword to declare a constant. Constants must be assigned a value immediately:

const PI = 3.14159
const APP_NAME = "TechScript"

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🚫 Reassignment Prevention

Attempting to reassign a constant or modify its reference will trigger a compilation error (TSE0302):

const MAX_LIMIT = 100
MAX_LIMIT = 200 # Compile Error!

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🧬 Scope & Lifetimes

Constants exist in the scope where they are declared. It is common to declare constants at the file level (global constants) to make them available across all functions:

const DB_VERSION = 2

do check_database()
    say $"Checking version {DB_VERSION}"
end