class Main {
public static void main(String[] args) {
System.out.println("Hello World!");
char letter = 'n';
char[] letters = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };
Main ls = new Main();
System.out.println(ls.findIndex(letter, letters));
}
public static int findIndex(char target, char[] data){
if (data == null ) return -1;
int result = -1;
for(int i = data.length - 1; i >= 0; i--){
char temp = data[i];
if (temp == target) {
return i;
}
}
return result;
}
}
