50g

I was trying to use IFTE in RPN rather than algebraic, and can't figure it out

On the stack, I assume I want -

* Test value
* Value to put on stack if test value is true
* Value to put on stack if test value is false

Say I want something like -

<< -> n 1 n <= 1 'f(n-1)' IFTE >>

Where I am defining a recursive function f(), and I want to execute f(n-1) if n < 1.  This is not working.

I am not sure why.