Float#arg

() -> (::Integer | ::Float)

arg → 0 or Math::PI

static VALUE
float_arg(VALUE self)
{
    if (isnan(RFLOAT_VALUE(self)))
        return self;
    if (f_tpositive_p(self))
        return INT2FIX(0);
    return rb_const_get(rb_mMath, id_PI);
}

Returns 0 if self is positive, Math::PI otherwise.

See also #angle #ceil #abs #coerce also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0

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