Float

capability

capability Float

Identifies floating-point types.

Floating-point constraints accept f32 and f64 values and imply signed numeric behavior together with Debug and Display. Their default text is the shortest correctly rounded decimal that parses back to the original value. Signed zero remains visible, and non-finite values use NaN, inf, and -inf.

Examples

Round a floating-point value

let nearest = 2.5.round()
let text = nearest as String

Requires

Member	Description	Available through
Debug	Produces an unambiguous structural representation of a value.
Signed	Identifies signed numeric types.

Implemented by

Member	Description	Available through
f32	Stores a 32-bit floating-point number.
f64	Stores a 64-bit floating-point number.

Methods

Member	Description	Available through
ceil	Rounds up to the nearest integral value.
floor	Rounds down to the nearest integral value.
isFinite	Returns whether the receiver is neither infinity nor NaN.
isNaN	Returns whether the receiver is the floating-point not-a-number value.
round	Rounds to the nearest integral value, with halfway values rounded to even.
roundTo	Rounds to a requested number of digits after the decimal point.
sqrt	Returns the principal square root of this value.
truncate	Rounds this value toward zero to an integral value.