@@ -0,0 +1,14 @@
+function binarySearch(sortedArray, elementToFind) {
+    var lowIndex = 0;
+    var highIndex = sortedArray.length - 1;
+    while (lowIndex <= highIndex) {
+      var midIndex = Math.floor((lowIndex + highIndex) / 2);
+      if (sortedArray[midIndex] == elementToFind) {
+        return midIndex;
+      } else if (sortedArray[midIndex] < elementToFind) {
+        lowIndex = midIndex + 1;
+      } else {
+        highIndex = midIndex - 1;
+      }
+    } return null;
+  }