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class method

Math.frexp

Math.frexp(x) → [fraction, exponent]

static VALUE
math_frexp(VALUE unused_obj, VALUE x)
{
    double d;
    int exp;

    d = frexp(Get_Double(x), &exp);
    return rb_assoc_new(DBL2NUM(d), INT2NUM(exp));
}

Returns a two-element array containing the normalized fraction (a Float) and exponent (an Integer) of x.

Example

fraction, exponent = Math.frexp(1234)   #=> [0.6025390625, 11]
fraction * 2**exponent                  #=> 1234.0

See also .exp .gamma .erfc .hypot also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1

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