1234567891011121314151617181920212223main() { loop i := 0..10 { assert fac1(i) == fac2(i) }}fac1(n int) -> int { x := 1 loop i := 1..n+1 { x *= i } return x}fac2(n int) -> int { if n <= 1 { return 1 } return n * fac2(n - 1)}
