Update 1486-XOR-operation-in-an-array.js

Added the Code for 1486-XOR-operation-in-an-array.js

Author: chetannada

javascript/1486-XOR-operation-in-an-array.js

@@ -0,0 +1,14 @@
+/**
+ * @param {number} n
+ * @param {number} start
+ * @return {number}
+ */
+var xorOperation = function(n, start) {
+    let nums = new Array(n).fill(0); // initialize a nums which is the length of n elements with 0 value of Array using Array() nad fill()
+
+    for(let i=0; i<n; i++){ // loop through the 0 to n
+        nums[i] = start + (2 * i); // current element of nums is equal to sum of start and twice the i
+    }
+    
+    return nums.reduce((a,b) => a^b); // return the bitwise XOR of all elements of nums using reduce()
+};