C program to print upper and lower case letters

C program to print upper and lower case letters

Output:

Enter a string or sentence:
CodeRegister Is A LeaRninG PortaL FoR ComPuteR SciencE AspiRantS!

The lowercase characters in the entered sentence / string are:
o d e e g i s t e r s e a n i n o r t a o o m u t e c i e n c s p i a n t 

The uppercase characters in the entered sentence / string are:
C R I A L R G P L F R C P R S E A R S 

Implementation: