Y must be numeric. R is numeric and is the Yth power of e, the base of natural logarithms.

Example

      *1 0
2.718281828 1
 
      *0j1 1j2
0.5403023059J0.8414709848 ¯1.131204384J2.471726672
 
      1+*○0j1 ⍝ Euler Identity
0