Cannot convert from char to string

String org = "Welcome";
String rev = "";

for (int i = org.length()-1; i >= 0; i--) {
    rev = rev+org.charAt(i);
}
System.out.println(rev);

What does this line mean? = rev+org.charAt(i);

>Solution :

It is a statement to add to the variable rev the character in org at i position. Because you are doing this in a loop, it incrementally adds character in position i.

So iterations becomes :

rev = ""  + e --> resulting in e
rev = "e" + m --> resulting in em
rev = "em" + o --> resulting in emo
rev = "emo" + c --> resulting in emoc
rev = "emoc" + l --> resulting in emocl
rev = "emocl" + e --> resulting in emocle
rev = "emocl" + W --> resulting in emocleW