Hi harryyangco,

That code appears to be correct---are you seeing any error messages? If so, could you please share those and copy/paste your code here?

Since this program requires user input, once you click Run you'll need to type in one of the subjects on the right-hand side of the page where the blinking cursor is in order to continue.

I hope this helps!

Hi Evan,

I didn't know that I have to type the subject name on the right-hand side of the page. Thanks for ur help!