Greatest Common DIvisor Program

[ritikamishra01]

## Description

enter here if you have any details

GCD program -
Issue No.- #

Type issue number after hash(#)

Checklist(self check)

• [ ] Yes, this task assigned to me.
• [ ] My code follows the style guidelines(Clean Code) of this project
• [x] I have performed a self-review of my own code
• [x] My Filename is in camelCase format
• [ ] I have added Problem statement, Problem link in file.

[aayushi-droid]

Need some changes for merge

• issue number is missing
• problem title and link to problem in file-header missing