Merge two strings letter by letter in Java?

Question

Given two strings, A and B, create a bigger string made of the first char of A, the first char of B, the second char of A, the second char of B, and so on. Any le

Answer 1

Here is my Approach, feedback is most welcome

void printPattern(String str, String str1){
    int length1 = str.length();
    int length2 = str1.length();
    int i =0;
    String output ="";
    while(length1 > 0 && length2 > 0){
         output += (str.charAt(i)) ;
         output += (str1.charAt(i)) ;
        length1-- ; length2-- ; i++;
    }
    System.out.println(output);
}