There are a lot of questions that have excellent answers, but none of the answer is accepted by the OP. If noticed, one can see that the OP no more uses the site. If certain powers are given to moderators, the site could be much cleaner. I pretty my know this is a duplicate of - This Question but...
To check whether the installation is successful or not, and run the Jupyter Notebook, run the following command in the Anaconda prompt or command prompt (Windows) or terminal (Mac/Linux).