91Ó°ÊÓ

Write an application that uses String method regionMatches to compare two strings input by the user. The application should input the number of characters to be compared and the starting index of the comparison. The application should state whether the strings are equal. Ignore the case of the characters when performing the comparison.

Write an application that inputs a line of text and outputs the text twice once in all uppercase letters and once in all lowercase letters.