f64

Built-in type

f64

Stores a 64-bit floating-point number.

Floating-point values are useful for game coordinates, timers, and duration conversion. Decimal exponents and finite subnormal values are supported. Unconstrained floating-point literals and values specifically constrained as Float default to f64. Memory reads never use this default and require an explicit or otherwise exact representation.

Examples

Use f64

let smallestPositive: f64 = 5e-324

Capabilities

Member	Description	Available through
Float	Identifies floating-point types.
MemoryReadable	Supports deserialization from process memory.

Operators

Member	Description	Available through
==	Reports whether this value and another value are equal.	Available through Equatable
!=	Reports whether this value and another value differ.	Available through Equatable
+	Adds another value of the same numeric type.	Available through Numeric
/	Divides by another value of the same numeric type.	Available through Numeric
*	Multiplies by another value of the same numeric type.	Available through Numeric
-	Subtracts another value of the same numeric type.	Available through Numeric
-	Returns this value with its sign inverted.	Available through Signed

Methods

Member	Description	Available through
debugString	Converts the receiver to its unambiguous structural representation.	Available through Debug
toString	Converts the receiver to its user-facing string representation.	Available through Display
ceil	Rounds up to the nearest integral value.	Available through Float
floor	Rounds down to the nearest integral value.	Available through Float
isFinite	Returns whether the receiver is neither infinity nor NaN.	Available through Float
isNaN	Returns whether the receiver is the floating-point not-a-number value.	Available through Float
round	Rounds to the nearest integral value, with halfway values rounded to even.	Available through Float
roundTo	Rounds to a requested number of digits after the decimal point.	Available through Float
sqrt	Returns the principal square root of this value.	Available through Float
truncate	Rounds this value toward zero to an integral value.	Available through Float
clamp	Restricts a numeric value to an inclusive range.	Available through Numeric
max	Returns the larger of two numeric values.	Available through Numeric
min	Returns the smaller of two numeric values.	Available through Numeric
squared	Multiplies this value by itself.	Available through Numeric
swapBytes	Reverses the order of the bytes in this numeric value.	Available through Numeric
abs	Returns this value without a negative sign.	Available through Signed
NaN	The canonical 64-bit not-a-number value.
fromBits	Constructs a 64-bit float from its exact IEEE-754 bit pattern.
negativeInfinity	Negative infinity as a 64-bit floating-point value.
positiveInfinity	Positive infinity as a 64-bit floating-point value.
toBits	Returns this float's exact IEEE-754 bit pattern.