Why this code caused compilation error

Question

https://code.sololearn.com/c0IHJ87Kb46K/?ref=app

Answer 1

Your code appears to have invisible characters on line 9, 10, 11, 13 and 17. Remove the indentations and redo them in Code Playground. The code works fine afterwards.

Answer 2

Thanks Hatsy Rei, it help me out.