Create scala.md

pages/common/scala.md

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+# Scala
+
+> Scala Application Launcher and interactive interpreter
+
+- Call a Scala interactive shell (REPL):
+
+`scala`
+
+- Execute a script in a given Scala file:
+
+`scala {{script.scala}}`
+
+- Execute a .jar program:
+
+`scala {{filename.jar}}`
+
+- Execute a single Scala command in the command line:
+
+`scala -e {{command}}`
+
+
+
+
+