Why it don’t works?

Question

Why it don’t works?
https://code.sololearn.com/c0c3XSSUKryb/?ref=app

Answer 1

Java is case-sensitive. Change system to System.

Answer 2

Mohammad Javad Alijani
extra {} are valid, even if unnecessary in this case ^^

Answer 3

Remove extra {} and system should be System cause java is case-sensitive

Answer 4

thank you very much!