I literally just came across this video looking to become certified in Zoho Creator soon and other Zoho One Applications! I know it has been 2yrs since the video has been posted, but it did not seem like anyone commented with a correct answer or posted the answer inside in community as instructed. I am just following directions. @11:28 you mentioned if someone can spot the mistake needed to execute the code.  The variable missing is "marks", "marks" is not defined before the IF statement! The IF statement doesn't know what grade to check for. I look forward to being a part of the community!