Preview Ruby 4.1 is a preview. It can change before the final release. Switch to Ruby 4.0 →

instance method

Float#finite?

() -> bool

finite? → true or false

VALUE
rb_flo_is_finite_p(VALUE num)
{
    double value = RFLOAT_VALUE(num);

    return RBOOL(isfinite(value));
}

Returns true if self is not Infinity, -Infinity, or NaN, false otherwise:

Example

f = 2.0      # => 2.0
f.finite?    # => true
f = 1.0/0.0  # => Infinity
f.finite?    # => false
f = -1.0/0.0 # => -Infinity
f.finite?    # => false
f = 0.0/0.0  # => NaN
f.finite?    # => false

See also #fdiv #floor #eql? #hash also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

‹ prev#fdiv next ›#floor