constant in Go
Constants are declared like variables, but with the const keyword. Constants cannot be declared using the := syntax. Numeric constants are high-precision values. ``` package main import "fmt" const s string = "constant" func main() { const n = 500000000 fmt.Println(s) fmt.Println(n) } ``` An untyped constant takes the type needed by its context. An int can store at maximum a 64-bit integer, and sometimes less.