How input in java

Answer 1

At line 5, it should be `Scanner sc = new Scanner(System.in);`

Class names begins with uppercase letter, so `Scanner` is correct but `scanner` is unknown class name.

Java syntax is case sensitive.

Answer 2

Maybe you should start reading rather than asking.

Answer 3

https://code.sololearn.com/c742BPpz76K9/?ref=app

Answer 4

https://code.sololearn.com/cd42ki7Dgedc/?ref=app

solution please