#### History of Idiom 31 > diff from v22 to v23

Edit summary for version 23 :

[Erlang] Online demo added

[Erlang] Online demo added

↷

#### Version 22

2016-01-26, 02:26:09

#### Version 23

2016-01-26, 02:26:55

# Idiom #31 Recursive factorial (simple)

Create recursive function f which returns the factorial of non-negative integer i, calculated from f(i-1)

# Idiom #31 Recursive factorial (simple)

Create recursive function f which returns the factorial of non-negative integer i, calculated from f(i-1)

##### Code

f(0) -> 1; f(I) -> I * f(I - 1).

##### Code

f(0) -> 1; f(I) -> I * f(I - 1).

##### Comments bubble

No defensive programming_ here.

##### Comments bubble

No defensive programming_ here.