ludic/docs/language/builtins/fn-float.md
Orkuncakilkaya e010c2cecc feat(lang): float and double types with ordinary operators
`float` (32-bit) and `double` (64-bit) with + - * / %, comparisons and unary minus.
Decimal literals take their type from context and stay `fixed` elsewhere; int and long
promote implicitly (LUDIC_WARN_FLOAT_PROMOTE=1 lists every promotion). float(), double(),
int(), long() and fixed() convert; floats(n)/doubles(n) buffers; float fields, globals,
constants and parameters; Math.* computes in float for float arguments; string/print
write the shortest round-tripping decimal; float_bits/float_from_bits expose the bits.
@deterministic code may not use floats. The f_* runtime helpers stay as they are.

Editors know the new type words; the JetBrains plugin is 1.5.0.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-16 16:13:31 +03:00

829 B

id name category kind tokens sig tip order
fn-float float builtins builtin float double float(x) -> float / double(x) -> double Convert any number to a float (or double). 51

Converts an int, long, fixed, float or double to a float (or, with double(x), to a double). It is the one conversion that crosses from fixed-point to floating point: float(fixed(1)) / 4.0 is 0.25. A decimal literal converts exactly, so float(0.1) is the nearest float to 0.1, not the nearest Q16.16 value.

Parameters:

  • x — the number to convert
program Convert {
  entry {
    let half = fixed(1) / 2
    print(float(half) * 3.0)           # 1.5
    print(double(7) / 2)               # 3.5
  }
}