Create 0303-range-sum-query-immutable.js

Solved range-sum-query-immutable.

File(s) Added: 0303-range-sum-query-immutable.js
Language(s) Used: JavaScript
Submission URL: https://leetcode.com/problems/range-sum-query-immutable/submissions/946368367/

Author: aadil42

javascript/0303-range-sum-query-immutable.js

@@ -0,0 +1,28 @@
+/**
+ * @param {number[]} nums
+ */
+var NumArray = function(nums) {
+    this.arr = nums;
+};
+
+/** 
+ * https://leetcode.com/problems/range-sum-query-immutable/description/
+ * Time O(n) | Space O(1)
+ * @param {number} left 
+ * @param {number} right
+ * @return {number}
+ */
+NumArray.prototype.sumRange = function(left, right) {
+    
+    let total = 0;
+    for(let i = left; i < right + 1; i++) {
+        total += this.arr[i];
+    }
+    return total
+};
+
+/** 
+ * Your NumArray object will be instantiated and called as such:
+ * var obj = new NumArray(nums)
+ * var param_1 = obj.sumRange(left,right)
+ */