islucky - Code Signal

isLucky.java

/*
Ticket numbers usually consist of an even number of digits. A ticket number is considered lucky if the sum of the first half of the digits is equal to the sum of the second half.

Given a ticket number n, determine if it's lucky or not.

Example

For n = 1230, the output should be
isLucky(n) = true;
For n = 239017, the output should be
isLucky(n) = false.

*/

boolean isLucky(int n) {
    String str = String.valueOf(n);
    
    int i = 0,j = str.length()-1;
    int a = 0;
    int b = 0;
    while(i<j){
            a += Integer.parseInt(""+str.charAt(i));
            b += Integer.parseInt(""+str.charAt(j));
            i++;
            j--;
    }
    
    return a == b;
    
}