max solution js
Intuition\n Describe your first thoughts on how to solve this problem. \n\n# Approach\n Describe your approach to solving the problem. \n\n# Complexity\n- Time 
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n\n# Complexity\n- Time complexity:\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\n\n- Space complexity:\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\n\n# Code\n```\n/**\n * @param {number[]} nums\n * @return {number}\n */\nvar maximumDifference = function(nums) {\n     let minVal = nums[0]\n    let maxDiff = -1\n\n    for (let j = 1; j < nums.length; j++) {\n        if (nums[j] > minVal) {\n            maxDiff = Math.max(maxDiff, nums[j] - minVal)\n        } else {\n            minVal = nums[j]\n        }\n    }\n\n    return maxDiff\n}\n//   console.log(maximumDifference([7,1,5,4]))\n```
['JavaScript']