$ kotlinc
Welcome to Kotlin version 1.2.31 (JRE 1.8.0_162-8u162-b12-0ubuntu0.16.04.2-b12)
Type:help for help,:quit for quit
>>> 20 + 22
42
>>> 5 * Math.sqrt(81.0)
45.0
>>> fun triple(x: Int) = x * 3
>>> triple(16)
48
>>>:quit