return term.Add(term, frac)
}

// This example demonstrates how to use big.Rat to compute the
// first 15 terms in the sequence of rational convergents for
// the constant e (base of natural logarithm).
func Example_eConvergents() {
	for i := 1; i <= 15; i++ {
		r := recur(0, int64(i))

		// Print r both as a fraction and as a floating-point number.
		// Since big.Rat implements fmt.Formatter, we can use %-13s to