//for array len=a.length...for str len=s.length()..."()"this fun symbol use is necessary /*arr.length here .length is a field... In Java, a field refers to a variable that is a member of a class or an ...

// Longest Substring - Write a function that takes a string and returns the longest substring in that string made up of the same character and the index the substring starts on, e.g. given the string ...