### LeetCode - Best Time to Buy and Sell Stock Solution - The Coding Shala

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In this post, we will learn how to solve LeetCode's Best Time to Buy and Sell Stock problem and will implement its solution in Java.

## Best Time to Buy and Sell Stock Problem

You are given an array of prices where prices[i] is the price of a given stock on an ith day. You want to maximize your profit by choosing a single day to buy one stock and choosing a different day in the future to sell that stock. Return the maximum profit you can achieve from this transaction. If you cannot achieve any profit, return 0.

**Example 1:**

Input: prices = [7,1,5,3,6,4]

Output: 5

Explanation: Buy on day 2 (price = 1) and sell on day 5 (price = 6), profit = 6-1 = 5.

Note that buying on day 2 and selling on day 1 is not allowed because you must buy before you sell.

Practice this problem on LeetCode.

## LeetCode - Best Time to Buy and Sell Stock Java Solution

**Approach 1**

Straight forward solution.

**Java Program: **

class Solution { public int maxProfit(int[] prices) { int maxProfit = 0; int buy = prices[0]; for (int i = 1; i < prices.length; i++) { int curr = prices[i]; // check if its lower then bought stock if (curr < buy) { buy = curr; continue; } maxProfit = Math.max(maxProfit, (curr - buy)); } return maxProfit; } }

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