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2620-counter/2620-counter.js

@@ -0,0 +1,17 @@
+/**
+ * @param {number} n
+ * @return {Function} counter
+ */
+var createCounter = function(n) {
+    
+    return function() {
+        return n++
+    };
+};
+
+/** 
+ * const counter = createCounter(10)
+ * counter() // 10
+ * counter() // 11
+ * counter() // 12
+ */