 Scala 2.12 BigInt API documentation

Official archived documentation: www.scala-lang.org/api/2.12.8/scala/math/BigInt.html

Relevant locators: remainder %, gcd, isValidInt and toInt. Scala's BigInt provides arbitrary-precision integer arithmetic; representability must be checked before conversion to a fixed-width integer because narrowing conversion need not preserve the exact value. The archived API corroborates the operations used in the solution without claiming a particular installed Oxford course library version.