Numbers

Donna has Int and Float.

code
let count = 3
let ratio = 0.5

Use Int for whole numbers and Float for decimal values.

code
fn next(value: Int) -> Int:
  value + 1

fn half(value: Float) -> Float:
  value /. 2.0

Underscores can group digits.

code
echo 1_000_000
echo 10_000.01

Integer literals can be binary, octal, or hex.

code
echo 0b00001111
echo 0o17
echo 0xF

Those all print the same value: 15.

Floats support scientific notation.

code
echo 7.0e7
echo 3.0e-4

Convert numbers to strings with the standard library when you need text output.

code
import donna/string

pub fn main() -> Nil:
  let total = 1 + 2 + 3
  echo string.from_int(total)
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