So i've been struggling with coding for the past 2 days.

I was trying to work out the basics of coding and scripting by getting simple movement with a square(2d).Ive looked at youtube videos and even tried copying the code down exactly and I was able to get the left and right movement but I couldn’t get the square to jum p. So I tried to fix it but I ended up somehow getting a compiler error and I don’t know what that means. The tutorial I watched was Brackeys 2d movement tutorial.I have tried anything and everything I could think off but nothing seems to be working so please help.(I’m new to game development and started not even 4 days ago)

Can you post your code so I can try to understand the problem?