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instance method

Float#infinite?

infinite? → -1, 1, or nil

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

    if (isinf(value)) {
        return INT2FIX( value < 0 ? -1 : 1 );
    }

    return Qnil;
}

Returns:

1, if self is Infinity.
-1 if self is -Infinity.
nil, otherwise.

Examples:

Example

f = 1.0/0.0  # => Infinity
f.infinite?  # => 1
f = -1.0/0.0 # => -Infinity
f.infinite?  # => -1
f = 1.0      # => 1.0
f.infinite?  # => nil
f = 0.0/0.0  # => NaN
f.infinite?  # => nil

See also #hash #inspect #floor #magnitude also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0

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