What does this error mean

Question

https://code.sololearn.com/cCAnAhPDH4Yk/?ref=app

Answer 1

I think you've missed the difference between == and =.

Answer 2

Java conditions must be boolean types. So if (i=1) is wrong, not condition but if( i==1) is correct way..
1||1 is not supports. int || int is wrong.
true || false is valid.