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instance method

Float#infinite?

float.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 nil, -1, or 1 depending on whether the value is finite, -Infinity, or +Infinity.

Example

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

See also #hash #inspect #floor #magnitude also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1

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