1. After attempting all coding questions, Navigate to 'Run Code' and click on it.

2. If you want to run your code along with the test cases then select the option of 'Run with test cases' and again click on 'Run Code'. 

Note: You can check your test cases just after you click on 'Run Code'  which will be shown in the bottom right core of the window. You can see if your test cases are correct or not so that accordingly you can change your code before submitting the test.