Class: Float

Inherits:

Numeric

• Object
• NSObject
• NSValue
• NSNumber
• Numeric
• Float

show all

Includes:

Precision

Overview

Constant Summary

ROUNDS

RADIX

MANT_DIG

DIG

MIN_EXP

MAX_EXP

MIN_10_EXP

MAX_10_EXP

MIN

MAX

EPSILON

INFINITY

NAN

Class Method Summary (collapse)

• + induced_from

  Convert obj to a float.

Instance Method Summary (collapse)

• - %

  Return the modulo after division of flt by other.

• - *

  Returns a new float which is the product of float and other.

• - **

  Raises float the other power.

• - +

  Returns a new float which is the sum of float and other.

• - -

  Returns a new float which is the difference of float and other.

• - -

  Returns float, negated.

• - /

  Returns a new float which is the result of dividing float by other.

• - <

  true if flt is less than real.

• - <=

  true if flt is less than or equal to real.

• - <=>

  Returns -1, 0, +1 or nil depending on whether flt is less than, equal to, or greater than real.

• - ==

  Returns true only if obj has the same value as flt.

• - >

  true if flt is greater than real.

• - >=

  true if flt is greater than or equal to real.

• - abs

  Returns the absolute value of flt.

• - angle

  Returns 0 if the value is positive, pi otherwise.

• - arg

  Returns 0 if the value is positive, pi otherwise.

• - ceil

  Returns the smallest Integer greater than or equal to flt.

• - coerce

  Returns an array with both aNumeric and flt represented as Float objects.

• - denominator

  Returns the denominator (always positive).

• - divmod

  See Numeric#divmod.

• - eql?

  Returns true only if obj is a Float with the same value as flt.

• - quo

  Returns float / numeric.

• - finite?

  Returns true if flt is a valid IEEE floating point number (it is not infinite, and nan? is false).

• - floor

  Returns the largest integer less than or equal to flt.

• - hash

  Returns a hash code for this float.

• - infinite?

  Returns nil, -1, or +1 depending on whether flt is finite, -infinity, or +infinity.

• - magnitude

  Returns the absolute value of flt.

• - modulo

  Return the modulo after division of flt by other.

• - nan?

  Returns true if flt is an invalid IEEE floating point number.

• - numerator

  Returns the numerator.

• - phase

  Returns 0 if the value is positive, pi otherwise.

• - quo

  Returns float / numeric.

• - rationalize

  Returns a simpler approximation of the value (flt-|eps|

• - round

  Rounds flt to a given precision in decimal digits (default 0 digits).

• - to_f

  As flt is already a float, returns self.

• - to_i

  Returns flt truncated to an Integer.

• - to_int

  Returns flt truncated to an Integer.

• - to_r

  Returns the value as a rational.

• - to_s

  Returns a string containing a representation of self.

• - truncate

  Returns flt truncated to an Integer.

• - zero?

  Returns true if flt is 0.0.

Methods included from Precision

included, #prec, #prec_f, #prec_i

Methods inherited from Numeric

#+@, #abs2, #class, #conj, #conjugate, #div, #dup, #i, #imag, #imaginary, #initialize_copy, #integer?, #nonzero?, #polar, #real, #real?, #rect, #rectangular, #remainder, #scalar?, #singleton_method_added, #step, #to_c

Methods included from Comparable

#between?

Methods inherited from NSNumber

#boolValue, #charValue, #compare:, #decimalValue, #descriptionWithLocale:, #doubleValue, #floatValue, #initWithBool:, #initWithChar:, #initWithDouble:, #initWithFloat:, #initWithInt:, #initWithInteger:, #initWithLong:, #initWithLongLong:, #initWithShort:, #initWithUnsignedChar:, #initWithUnsignedInt:, #initWithUnsignedInteger:, #initWithUnsignedLong:, #initWithUnsignedLongLong:, #initWithUnsignedShort:, #intValue, #integerValue, #isEqualToNumber:, #longLongValue, #longValue, numberWithBool:, numberWithChar:, numberWithDouble:, numberWithFloat:, numberWithInt:, numberWithInteger:, numberWithLong:, numberWithLongLong:, numberWithShort:, numberWithUnsignedChar:, numberWithUnsignedInt:, numberWithUnsignedInteger:, numberWithUnsignedLong:, numberWithUnsignedLongLong:, numberWithUnsignedShort:, #objCType, #shortValue, #stringValue, #unsignedCharValue, #unsignedIntValue, #unsignedIntegerValue, #unsignedLongLongValue, #unsignedLongValue, #unsignedShortValue

Methods inherited from NSValue

#getValue:, #initWithBytes:objCType:, #isEqualToValue:, #nonretainedObjectValue, #objCType, #pointerValue, #rangeValue, value:withObjCType:, valueWithBytes:objCType:, valueWithNonretainedObject:, valueWithPointer:, valueWithRange:

Methods inherited from NSObject

#!, #!=, #!~, #===, #=~, #Rational, #__callee__, #__method__, #__send__, #__type__, `, alloc, allocWithZone:, #autoContentAccessingProxy, autoload, autoload?, autorelease_pool, #awakeAfterUsingCoder:, binding, block_given?, caller, cancelPreviousPerformRequestsWithTarget:, cancelPreviousPerformRequestsWithTarget:selector:object:, catch, class, classFallbacksForKeyedArchiver, #classForCoder, #classForKeyedArchiver, classForKeyedUnarchiver, #clone, conformsToProtocol:, #copy, copyWithZone:, #dealloc, #define_singleton_method, description, display, #doesNotRecognizeSelector:, #dup, #enum_for, #equal?, #extend, fail, #finalize, format, #forwardInvocation:, #forwardingTargetForSelector:, framework, #freeze, #frozen?, getpass, gets, global_variables, #init, initialize, #initialize_clone, #initialize_copy, #initialize_dup, #inspect, instanceMethodForSelector:, instanceMethodSignatureForSelector:, #instance_eval, #instance_exec, #instance_of?, #instance_variable_defined?, #instance_variable_get, #instance_variable_set, #instance_variables, instancesRespondToSelector:, isSubclassOfClass:, #is_a?, iterator?, #kind_of?, lambda, load, load_bridge_support_file, load_plist, local_variables, loop, #method, #methodForSelector:, #methodSignatureForSelector:, #methods, #mutableCopy, mutableCopyWithZone:, new, #nil?, open, p, #performSelector:onThread:withObject:waitUntilDone:, #performSelector:onThread:withObject:waitUntilDone:modes:, #performSelector:withObject:afterDelay:, #performSelector:withObject:afterDelay:inModes:, #performSelectorInBackground:withObject:, #performSelectorOnMainThread:withObject:waitUntilDone:, #performSelectorOnMainThread:withObject:waitUntilDone:modes:, print, printf, #private_methods, proc, #protected_methods, #public_method, #public_methods, #public_send, putc, puts, raise, rand, readline, readlines, #replacementObjectForCoder:, #replacementObjectForKeyedArchiver:, require, resolveClassMethod:, resolveInstanceMethod:, #respond_to?, #respond_to_missing?, select, #send, setVersion:, #singleton_methods, sprintf, srand, superclass, #taint, #tainted?, #tap, test, throw, #to_plist, trace_var, trap, #trust, #untaint, untrace_var, #untrust, #untrusted?, version

6543.21.modulo(137)      #=> 104.21
6543.21.modulo(137.24)   #=> 92.9299999999996

2.0**3      #=> 8.0

1.0 == 1   #=> true

(-34.56).abs   #=> 34.56
-34.56.abs     #=> 34.56

1.2.ceil      #=> 2
2.0.ceil      #=> 2
(-1.2).ceil   #=> -1
(-2.0).ceil   #=> -2

1.2.coerce(3)       #=> [3.0, 1.2]
2.5.coerce(1.1)     #=> [1.1, 2.5]

1.0.eql?(1)   #=> false

1.2.floor      #=> 1
2.0.floor      #=> 2
(-1.2).floor   #=> -2
(-2.0).floor   #=> -2

(0.0).infinite?        #=> nil
(-1.0/0.0).infinite?   #=> -1
(+1.0/0.0).infinite?   #=> 1

(-34.56).abs   #=> 34.56
-34.56.abs     #=> 34.56

6543.21.modulo(137)      #=> 104.21
6543.21.modulo(137.24)   #=> 92.9299999999996

a = -1.0      #=> -1.0
a.nan?        #=> false
a = 0.0/0.0   #=> NaN
a.nan?        #=> true

n = 0.3.numerator    #=> 5404319552844595
d = 0.3.denominator  #=> 18014398509481984
n.fdiv(d)            #=> 0.3

0.3.rationalize          #=> (3/10)
1.333.rationalize        #=> (1333/1000)
1.333.rationalize(0.01)  #=> (4/3)

1.4.round      #=> 1
1.5.round      #=> 2
1.6.round      #=> 2
(-1.5).round   #=> -2

1.234567.round(2)  #=> 1.23
1.234567.round(3)  #=> 1.235
1.234567.round(4)  #=> 1.2346
1.234567.round(5)  #=> 1.23457

34567.89.round(-5) #=> 0
34567.89.round(-4) #=> 30000
34567.89.round(-3) #=> 35000
34567.89.round(-2) #=> 34600
34567.89.round(-1) #=> 34570
34567.89.round(0)  #=> 34568
34567.89.round(1)  #=> 34567.9
34567.89.round(2)  #=> 34567.89
34567.89.round(3)  #=> 34567.89

2.0.to_r    #=> (2/1)
2.5.to_r    #=> (5/2)
-0.75.to_r  #=> (-3/4)
0.0.to_r    #=> (0/1)