Recursive factorial calculator without if

main.go

package main

import "fmt"

func main() {
	fmt.Println(Factorial(65))
}

func Factorial(n uint64) uint64 {
	factorialOp(&n, 1, n)
	return n
}

func factorialOp(n *uint64, current uint64, On uint64) bool {
	*n *= current
	current++
	return current >= On || factorialOp(n, current, On)
}