Create basic logging functions

[ojasmaheshwari]

Create 3 functions inside Logger class:-

1. info()
   Takes in a string argument message and prints string in below format:-
   [INFO] message
2. warn()
   Takes in a string argument message and prints string in below format:-
   [WARNING] message
3. error()
   Takes in a string argument message and prints string in below format:-
   [ERROR] message

For eg:-


Code

Logger log;
log.info("Some information");
log.warn("Some warning");
log.error("Some error");

Expected Output:

[INFO] Some information
[WARNING] Some warning
[ERROR] Some error

[Shankar-Balajee]

Hello ! I'd like to claim this issue.