float

Note

This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information.

Returns a cryptographically secure random float in the range [0.0, 1.0) (i.e. the return value is >= 0.0 and < 1.0)

namespace HH\Lib\SecureRandom;

function float(): float;

For pseudorandom floats, see PseudoRandom\float.

Returns

• float