diff --git a/src/map_function.js b/src/map_function.js
new file mode 100644
index 0000000..38686a2
--- /dev/null
+++ b/src/map_function.js
@@ -0,0 +1,12 @@
+// By using map function you can iterate to an array and apply some filter to it. 
+// Map function receives a callback function.
+// Will return only if the number is even.
+
+var arr = [1,5,4,8,11];
+
+var printed =arr.map(item=>{
+                        if(item%2==0) {return item};
+                     });
+
+    console.log(printed);
+