Floats

- IEEE-754-2008 binary16
f32 - IEEE-754-2008 binary32
f64 - IEEE-754-2008 binary64
f128 - IEEE-754-2008 binary128

Float literals have type comptime_float which is guaranteed to have the same precision and operations of the largest other floating point type, which is .

Float literals to any floating point type, and to any integer type when there is no fractional component.

float_literals.zig

float_special_values.zig

const std = @import("std");
const inf = std.math.inf(f32);
const negative_inf = -std.math.inf(f64);
const nan = std.math.nan(f128);

Floating Point Operations

By default floating point operations use Strict mode, but you can switch to mode on a per-block basis:

foo.zig

$ zig build-obj foo.zig -O ReleaseFast

For this test we have to separate code into two object files - otherwise the optimizer figures out all the values at compile-time, which operates in strict mode.

float_mode.zig

Shell


$ ./float_mode
optimized = 1.0e-03
strict = 9.765625e-04

Division by Zero