Doc - added documentation for ArangoShell `print` function (#4397)

Documentation/Books/Manual/Administration/Arangosh/Output.md

@@ -1,6 +1,33 @@
 ArangoDB Shell Output
 =====================
 
+The ArangoDB shell will print the output of the last evaluated expression
+by default:
+    
+    @startDocuBlockInline lastExpressionResult
+    @EXAMPLE_ARANGOSH_OUTPUT{lastExpressionResult}
+    42 * 23
+    @END_EXAMPLE_ARANGOSH_OUTPUT
+    @endDocuBlock lastExpressionResult
+    
+In order to prevent printing the result of the last evaluated expression,
+the expression result can be captured in a variable, e.g.
+
+    @startDocuBlockInline lastExpressionResultCaptured
+    @EXAMPLE_ARANGOSH_OUTPUT{lastExpressionResultCaptured}
+    var calculationResult = 42 * 23
+    @END_EXAMPLE_ARANGOSH_OUTPUT
+    @endDocuBlock lastExpressionResultCaptured
+
+There is also the `print` function to explicitly print out values in the
+ArangoDB shell:
+
+    @startDocuBlockInline printFunction
+    @EXAMPLE_ARANGOSH_OUTPUT{printFunction}
+    print({ a: "123", b: [1,2,3], c: "test" });
+    @END_EXAMPLE_ARANGOSH_OUTPUT
+    @endDocuBlock printFunction
+
 By default, the ArangoDB shell uses a pretty printer when JSON documents are
 printed. This ensures documents are printed in a human-readable way:
 
@@ -14,7 +41,7 @@ printed. This ensures documents are printed in a human-readable way:
     @endDocuBlock usingToArray
 
 While the pretty-printer produces nice looking results, it will need a lot of
-screen space for each document. Sometimes, a more dense output might be better.
+screen space for each document. Sometimes a more dense output might be better.
 In this case, the pretty printer can be turned off using the command
 *stop_pretty_print()*.