// Copyright 2021 The Go Authors. All rights reserved. | |
// Use of this source code is governed by a BSD-style | |
// license that can be found in the LICENSE file. | |
package a | |
func Fact[T interface{ int | int64 | float64 }](n T) T { | |
if n == 1 { | |
return 1 | |
} | |
return n * Fact(n-1) | |
} |