Initial data commit

Task/Empty-string/Scala/empty-string.scala

@@ -0,0 +1,10 @@
+// assign empty string to a variable
+val s=""
+// check that string is empty
+s.isEmpty    // true
+s==""        // true
+s.size==0    // true
+// check that string is not empty
+s.nonEmpty   // false
+s!=""        // false
+s.size>0     // false