Strings

1. Input a String from user and count No. of uppercase letters it contain.
2. Input a line of multiple words from user and count No. of words it contain.
3. Input a string and convert its uppercase letters to smallcase and vice verse.
   Expected Output:

      Enter String : RealJava
      rEALjAVA
                          

4. Input a string and make its reverse without using library functions.
   Expected Output:

      Enter String : BCE
      ECB
                          

5. Program to match the content of 2 Strings without using Lib Function.
6. Program to count length of String.
7. Program to replace all digits of a string with '*'
   Expected Output:

      Enter String : A12BC
      A**BC