title: Product of a List or Array in Kotlin
body: <p>I'm trying to find a way to get the product of a List or Array without using  "repeat" or any loop on Kotlin but after some research I couldn't find anything similar.</p>
  
  <p>Something like this in Python would be:</p>
  
  <pre><code>&gt;&gt;&gt; reduce(lambda x, y: x*y, [1,2,3,4,5,6])
  output: 720
  </code></pre>