class Fixnum < Integer

A Fixnum holds Integer values that can be represented in a native machine word (minus 1 bit). If any operation on a Fixnum exceeds this range, the value is automatically converted to a Bignum.

Fixnum objects have immediate value. This means that when they are assigned or passed as parameters, the actual object is passed, rather than a reference to that object. Assignment does not alias Fixnum objects. There is effectively only one Fixnum object instance for any given integer value, so, for example, you cannot add a singleton method to a Fixnum.

instance methods

Arithmetic operations
Performs various arithmetic operations on fix.
fix + aNumeric Addition
fix - aNumeric Subtraction
fix * aNumeric Multiplication
fix / aNumeric Division
fix % aNumeric Modulo
fix ** aNumeric Exponentiation
Bit operations
Performs various operations on the binary representations of the Fixnum.
~ fix Invert bits
fix | aNumeric Bitwise OR
fix & aNumeric Bitwise AND
fix ^ aNumeric Bitwise EXCLUSIVE OR
fix << aNumeric Left-shift aNumeric bits
fix >> aNumeric Right-shift aNumeric bits (with sign extension)
fix <=> aNumeric → -1, 0, +1
Comparison—Returns -1, 0, or +1 depending on whether fix is less than, equal to, or greater than aNumeric. This is the basis for the tests in Comparable.
[ ]
fix[ n ] → 0, 1
Bit Reference—Returns the nth bit in the binary representation of fix, where fix[0] is the least significant bit.
a = 0b11001100101010 30.downto(0) do |n| print a[n] end


fix.id2name → aString or nil
Returns the name of the object whose symbol id is the value of fix. If there is no symbol in the symbol table with this value, returns nil. id2name has nothing to do with the method. See also String#intern and class Symbol.
symbol = :@inst_var :@inst_var id = symbol.to_i 9002 id.id2name "@inst_var"
fix.size → aFixnum
Returns the number of bytes in the machine representation of a Fixnum.
fix.to_f → aFloat
Converts fix to a Float.
fix.to_i → fix
Returns fix.
fix.to_s → aString
Returns a string containing the decimal representation of self.
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