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instance method

Complex#to_f

() -> ::Float

to_f → float

static VALUE
nucomp_to_f(VALUE self)
{
    get_dat1(self);

    if (!k_exact_zero_p(dat->imag)) {
        rb_raise(rb_eRangeError, "can't convert %"PRIsVALUE" into Float",
                 self);
    }
    return f_to_f(dat->real);
}

Returns the value of self.real as a Float, if possible:

Example

Complex.rect(1, 0).to_f              # => 1.0
Complex.rect(1, Rational(0, 1)).to_f # => 1.0

Raises RangeError if self.imag is not exactly zero (either Integer(0) or Rational(0, n)).

See also #to_c #to_i #rectangular #to_r also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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