scala> :help All commands can be abbreviated, e.g. :he instead of :help. Those marked with a * have more detailed help, e.g. :help imports. :cp add a jar or directory to the classpath :help [command] print this summary or command-specific help :history [num] show the history (optional num is commands to show) :h? search the history :imports [name name ...] show import history, identifying sources of names :implicits [-v] show the implicits in scope :javap disassemble a file or class name :load load and interpret a Scala file :paste enter paste mode: all input up to ctrl-D compiled together :power enable power user mode :quit exit the interpreter :replay reset execution and replay all previous commands :reset reset the repl to its initial state, forgetting all session entries :sh run a shell command (result is implicitly => List[String]) :silent disable/enable automatic printing of results :type [-v] display the type of an expression without evaluating it :warnings show the suppressed warnings from the most recent line which had any