Write a function that takes (x, y) and return x to the power of y WITHOUT Loops
APL (7)

{×/⍵/⍺}


Left argument is base, right argument is exponent, e.g.:

     5 {×/⍵/⍺} 6
15625


Explanation:


⍵/⍺ replicates ⍺ ⍵ times, e.g. 5 {⍵/⍺} 6 -> 5 5 5 5 5 5
×/ takes the product, e.g. ×/5 5 5 5 5 5 -> 5×5×5×5×5×5 -> 15625