Operators

Integer arithmetic uses familiar operators.

code
let total = 1 + 2
let rest = 10 - 3
let doubled = 4 * 2
let half = 8 / 2
let remainder = 10 % 3

Float arithmetic uses dot operators. It keeps integer math and floating-point math visually distinct.

code
let total = 1.0 +. 2.0
let rest = 10.0 -. 3.0
let doubled = 4.0 *. 2.0
let half = 8.0 /. 2.0

Integer comparisons use the usual comparison operators.

code
fn is_large(value: Int) -> Bool:
  value > 10

Float comparisons use dot operators too.

code
fn is_large_float(value: Float) -> Bool:
  value >. 10.0

fn is_small_float(value: Float) -> Bool:
  value <=. 1.0

String concatenation uses <>.

code
fn path(slug: String) -> String:
  "/docs/" <> slug

The pipe operator |> sends a value into the next function.

code
import donna/string

pub fn main() -> Nil:
  "Language Tour"
  |> string.to_slug
  |> echo
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