diff --git "a/leetcode3/\354\240\225\354\247\204\354\230\201/4088. Difference Between Peaks and Valleys" "b/leetcode3/\354\240\225\354\247\204\354\230\201/4088. Difference Between Peaks and Valleys"
new file mode 100644
index 00000000..f6661b6e
--- /dev/null
+++ "b/leetcode3/\354\240\225\354\247\204\354\230\201/4088. Difference Between Peaks and Valleys"	
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+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+var peakValleyDifference = function(nums) {
+    let peakSum = 0;
+    let valleySum = 0;
+
+    for (let i = 1; i < nums.length - 1; i++){
+        if (nums[i] > nums[i-1] && nums[i] > nums[i+1]){
+            peakSum += nums[i];
+        } else if (nums[i] < nums[i - 1] && nums[i] < nums[i + 1]) {
+            valleySum += nums[i];
+        }
+    }
+
+    return (peakSum - valleySum);
+};