Java printing a String containing an integer

Question

I have a doubt which follows.

public static void main(String[] args) throws IOException{
  int number=1;
  System.out.println(\"M\"+number+1);
}

Answer 1

If you perform + operation after a string, it takes it as concatenation:

"d" + 1 + 1     // = d11 

Whereas if you do the vice versa + is taken as addition:

1 + 1 + "d"     // = 2d