[Java] Leetcode 227. Basic Calculator II [Stack & Queue #8]

In this video, I'm going to show you how to solve Leetcode 227. Basic Calculator II which is related to Stack & Queue.

Here’s a quick rundown of what you’re about to learn:

⭐️ Course Contents ⭐️
⌨️ (0:00) Question
⌨️ (2:29) Solution Explain
⌨️ (6:21) Code

In the end, you’ll have a really good understanding on how to solve Leetcode 227. Basic Calculator II and questions that are similar to this Stack & Queue.

[sampannapokhrel]

what if you have something like 2+3*5/2. If it is all an integer it will give you different results on / and * (depending on which you'll do first)

[mooneyross]

Great video! I was stuck on this problem and your approach helped me solve it. Thanks!

[amitkhatri]

Hey! thank you so much for the code, but can you tell me, how can i push and pop the decimal(.) in the stack.. if i have decimal values in my arithmetic string. Or how can I append the Dot(.) with suppose I have decimal value 2.5 so I want to append the Dot with 2 and push it on to the stack like this (2.) can you help me with this

[rydmerlin]

It's rare to see Leetcode solutions having instance variables and in your example you should ideally reset index = 0 at the beginning so that when testing you can call calculate multiple times for a given instance.