abstract struct Float

Overview

Float is the base type of all floating point numbers.

There are two floating point types, Float32 and Float64, which correspond to the binary32 and binary64 types defined by IEEE.

A floating point literal is an optional + or - sign, followed by a sequence of numbers or underscores, followed by a dot, followed by numbers or underscores, followed by an optional exponent suffix, followed by an optional type suffix. If no suffix is present, the literal's type is Float64.

1.0     # Float64
1.0_f32 # Float32
1_f32   # Float32

1e10   # Float64
1.5e10 # Float64
1.5e-7 # Float64

+1.3 # Float64
-0.5 # Float64

The underscore _ before the suffix is optional.

Underscores can be used to make some numbers more readable:

1_000_000.111_111 # better than 1000000.111111

Included Modules

Direct Known Subclasses

Defined in:

float.cr
time/span.cr
big_int/big_int.cr
json/to_json.cr

Class Method Summary

Instance Method Summary

Instance methods inherited from module Comparable(T)

<(other : T) <, <=(other : T) <=, <=>(other : T) <=>, ==(other : T) ==, >(other : T) >, >=(other : T) >=, between?(min, max) between?

Instance methods inherited from struct Number

*(other : Complex) *, +
+(other : Complex)
+
, -(other : Complex) -, /(other : Complex) /, <=>(other) <=>, ==(other : Complex) ==, abs abs, abs2 abs2, cis cis, clamp(min, max)
clamp(range : Range)
clamp
, divmod(number) divmod, i i, round(digits, base = 10) round, sign sign, significant(digits, base = 10) significant, step(limit = nil, by = 1)
step(limit = nil, by = 1, &block)
step
, to_c to_c, to_yaml(yaml : YAML::Generator) to_yaml

Class methods inherited from struct Number

[](*nums) [], zero zero

Instance methods inherited from module Comparable(T)

<(other : T) <, <=(other : T) <=, <=>(other : T) <=>, ==(other : T) ==, >(other : T) >, >=(other : T) >=, between?(min, max) between?

Instance methods inherited from struct Value

! !, ==(other) ==, nil? nil?

Instance methods inherited from class Object

! !, !=(other) !=, !~(other) !~, ==(other) ==, ===(other) ===, =~(other) =~, class class, clone clone, crystal_type_id crystal_type_id, dup dup, hash hash, inspect
inspect(io : IO)
inspect
, itself itself, not_nil! not_nil!, tap(&block) tap, to_json to_json, to_pretty_json(io : IO)
to_pretty_json
to_pretty_json
, to_s
to_s(io : IO)
to_s
, to_yaml(io : IO)
to_yaml
to_yaml
, try(&block) try

Class methods inherited from class Object

==(other : Class) ==, ===(other) ===, cast(other) : self cast, from_json(string_or_io) from_json, from_yaml(string : String) from_yaml, hash hash, inspect(io) inspect, name : String name, to_s(io) to_s

Class Method Detail

def self.from_io(io : IO, format : IO::ByteFormat) #

Reads a float from the given io in the given format. See IO#read_bytes.


[View source]

Instance Method Detail

def %(other) #

[View source]
def <=>(other : BigInt) #

[View source]
def days #

[View source]
def fdiv(other) #

[View source]
def finite? #

[View source]
def hours #

[View source]
def infinite? #

[View source]
def milliseconds #

[View source]
def minutes #

[View source]
def modulo(other) #

[View source]
def nan? #

[View source]
def remainder(other) #

[View source]
def seconds #

[View source]
def to_big_i #

[View source]
def to_io(io : IO, format : IO::ByteFormat) #

Writes this float to the given io in the given format. See IO#write_bytes.


[View source]
def to_json(io) #

[View source]