Float
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.crtime/span.cr
big/big_int.cr
big/big_rational.cr
json/to_json.cr
Class Method Summary
- .from_io(io : IO, format : IO::ByteFormat)
Reads a float from the given io in the given format.
Instance Method Summary
- #%(other)
- #-
- #<=>(other : BigRational)
- #<=>(other : BigInt)
- #days
- #fdiv(other)
- #finite?
- #hours
- #infinite?
- #milliseconds
- #minutes
- #modulo(other)
- #nan?
- #remainder(other)
- #seconds
- #to_big_i : BigInt
Returns a
BigIntrepresenting this float (rounded usingfloor). - #to_io(io : IO, format : IO::ByteFormat)
Writes this float to the given io in the given format.
- #to_json(json : JSON::Builder)
Instance methods inherited from module Comparable(BigRational)
<, <=(other : T) <=, <=>(other : T) <=>, ==(other : T) ==, >(other : T) >, >=(other : T) >= Instance methods inherited from module Comparable(BigInt)
<, <=(other : T) <=, <=>(other : T) <=>, ==(other : T) ==, >(other : T) >, >=(other : T) >= Instance methods inherited from struct Number
*(other : Complex)*(other : BigFloat) *, +(other : BigFloat)
+(other : Complex)
+ +, -(other : Complex)
-(other : BigFloat) -, /(other : Complex) /, <=>(other : BigFloat)
<=>(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(*, to = nil, by = 1, &block)
step(*, to = nil, by = 1) step, to_big_f to_big_f, to_c to_c, to_yaml(yaml : YAML::Builder) to_yaml
Class methods inherited from struct Number
zero : self zero Instance methods inherited from module Comparable(BigFloat)
<, <=(other : T) <=, <=>(other : T) <=>, ==(other : T) ==, >(other : T) >, >=(other : T) >= Instance methods inherited from module Comparable(Number)
<, <=(other : T) <=, <=>(other : T) <=>, ==(other : T) ==, >(other : T) >, >=(other : T) >= Instance methods inherited from struct Value
==(other) ==, dup dup Instance methods inherited from class Object
!=(other) !=, !~(other) !~, ==(other) ==, ===(other : JSON::Any)===(other : YAML::Any)
===(other) ===, =~(other) =~, class class, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, tap(&block) tap, to_json(io : IO)
to_json to_json, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ") 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
from_json(string_or_io, root : String) : selffrom_json(string_or_io) : self from_json, from_yaml(string_or_io) : self from_yaml
Class Method Detail
def self.from_io(io : IO, format : IO::ByteFormat)Source
Reads a float from the given io in the given format. See also: IO#read_bytes.
Instance Method Detail
def %(other)Source
def -Source
def <=>(other : BigRational)Source
def daysSource
def fdiv(other)Source
def finite?Source
def hoursSource
def infinite?Source
def millisecondsSource
def minutesSource
def modulo(other)Source
def nan?Source
def remainder(other)Source
def secondsSource
def to_io(io : IO, format : IO::ByteFormat)Source
Writes this float to the given io in the given format. See also: IO#write_bytes.
def to_json(json : JSON::Builder)Source
© 2012–2017 Manas Technology Solutions.
Licensed under the Apache License, Version 2.0.
https://crystal-lang.org/api/0.22.0/Float.html
