comefrom: <gouthampradhan>string_MultiplyStrings_1.java
code: private String add(String s1, String s2) {
      String result = "";
      int carry = 0;
      int i = s1.length() - 1, j = s2.length() - 1;
      for (; i >= 0 || j >= 0; i--, j--) {
        int l = (i >= 0) ? Integer.parseInt(String.valueOf(s1.charAt(i))) : 0;
        int r = (j >= 0) ? Integer.parseInt(String.valueOf(s2.charAt(j))) : 0;
        int sum = l + r + carry;
        carry = sum / 10;
        result = sum % 10 + result;
      }
      if (carry > 0) {
        result = carry + result;
      }
      return result;
    }
masked: private String var_0 ( String var_1 , String var_2 ) {
    String var_3 = "" ;
    int var_4 = 0 ;
    int var_5 = var_1 . length ( ) - 1 , var_6 = var_2 . length ( ) - 1 ;
    for ( ;
    var_5 >= 0 || var_6 >= 0 ;
    var_5 -- , var_6 -- ) {
      int var_7 = ( var_5 >= 0 ) ? Integer . parseInt ( String . valueOf ( var_1 . charAt ( var_5 ) ) ) : 0 ;
      int var_8 = ( var_6 >= 0 ) ? Integer . parseInt ( String . valueOf ( var_2 . charAt ( var_6 ) ) ) : 0 ;
      int var_9 = var_7 + var_8 + var_4 ;
      var_4 = var_9 / 10 ;
      var_3 = var_9 % 10 + var_3 ;
    }
    if ( var_4 > 0 ) {
      var_3 = var_4 + var_3 ;
    }
    return var_3 ;
  }
  