Constants - language feature

const one = 1

Example from Ruby:

# Constants in Ruby being with a capital letter. Will throw a warning or error, depending on runtime settings.
Name = "John"  
# Not a constant
name = "John"

Example from C3:

const FOO = 123;
const void* BAR = null;

Example from Speedie:

constants
 Opened = 1
 Closed = 2

Example from Jule:

const PI = 3.14159265359

Languages with Constants include Java, JavaScript, C, C++, PHP, Ruby, C#, Go, Rust, Kotlin, TypeScript, Julia, Objective-C, Dart, F#, Groovy, Chapel, SystemVerilog, C3, Speedie, Jule, Angelscript, Pizza, Apex, Eclipse Command Language, C2, nimrod, Oracle Java, Deesel, Tick C, cooC

Languages without Constants include progsbase

This question asks: Does the language have a way to declare constant compile time variables?

Read more about Constants on the web: 1.

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