Use the let keyword to declare a variable called character.
The variable name is character, not hello.
For the next time, instead of posting screenshoot, you should post your updated code by put your code between 2 line of ``` (3 back ticks) (the back tick key is usually right under the Esc key on your keyboard) , like this:
```
# your code here
```
or you can use the Preformatted Text button (the one with </> icon) (or press Ctrl + E):