aqua-playground/aqua/examples/constants.aqua

import "@fluencelabs/aqua-lib/builtin.aqua"

service Getter("test"):
    createStr: u32 -> string

service OpO("op"):
    identity: string -> string

service OpN("op"):
    identity: i32 -> i32

-- a question mark means that this constant could be rewritten before this definition
const ANOTHER_CONST ?= "default-str"
const UNIQUE_CONST ?= 5

func callConstant() -> []string:
    res: *string
    res <- Getter.createStr(UNIQUE_CONST)
    res <- OpO.identity(ANOTHER_CONST)
    <- res

const A = 2
const B = -3

func compareConstants():
  if A == B:
    OpN.identity(A)
  else:
    OpN.identity(B)