The class of the singleton object nil.

Methods
#
I
N
T
#
Instance Public methods
false & obj => false nil & obj => false

And—Returns false. obj is always evaluated as it is the argument to a method call—there is no short-circuit evaluation in this case.

Source: show 

static VALUE
false_and(obj, obj2)
    VALUE obj, obj2;
{
    return Qfalse;
}
false ^ obj => true or false nil ^ obj => true or false

Exclusive Or—If obj is nil or false, returns false; otherwise, returns true.

Source: show 

static VALUE
false_xor(obj, obj2)
    VALUE obj, obj2;
{
    return RTEST(obj2)?Qtrue:Qfalse;
}
nil.inspect => "nil"

Always returns the string “nil”.

Source: show 

static VALUE
nil_inspect(obj)
    VALUE obj;
{
    return rb_str_new2("nil");
}
nil?()

call_seq: 

  nil.nil?               => true

Only the object nil responds true to nil?.

Source: show 

static VALUE
rb_true(obj)
    VALUE obj;
{
    return Qtrue;
}
nil.to_a => []

Always returns an empty array. 

   nil.to_a   #=> []

Source: show 

static VALUE
nil_to_a(obj)
    VALUE obj;
{
    return rb_ary_new2(0);
}
nil.to_f => 0.0

Always returns zero. 

   nil.to_f   #=> 0.0

Source: show 

static VALUE
nil_to_f(obj)
    VALUE obj;
{
    return rb_float_new(0.0);
}
nil.to_i => 0

Always returns zero. 

   nil.to_i   #=> 0

Source: show 

static VALUE
nil_to_i(obj)
    VALUE obj;
{
    return INT2FIX(0);
}
nil.to_s => ""

Always returns the empty string. 

   nil.to_s   #=> ""

Source: show 

static VALUE
nil_to_s(obj)
    VALUE obj;
{
    return rb_str_new2("");
}
to_yaml( opts = {} )

Source: show 

     # File lib/yaml/rubytypes.rb, line 402
402:         def to_yaml( opts = {} )
403:                 YAML::quick_emit( nil, opts ) do |out|
404:             out.scalar( taguri, "", :plain )
405:         end
406:         end
false | obj => true or false nil | obj => true or false

Or—Returns false if obj is nil or false; true otherwise.

Source: show 

static VALUE
false_or(obj, obj2)
    VALUE obj, obj2;
{
    return RTEST(obj2)?Qtrue:Qfalse;
}