added math operations using bash dc , an older unix language

[RhooneN]

What type of PR is this? (check all applicable)

• ♻️ Refactor
• ✨ Feature
• 🐛 Bug Fix
• 👷 Optimization
• 📝 Documentation Update
• 🚩 Other

Description

Related Tickets & Documents

Added to documentation?

• 📜 readme
• 🙅 no documentation needed

[optional] What gif best describes this PR or how it makes you feel?

[what-the-diff]

PR Summary

• New Markdown File Addition
  A new markdown file named 1001-bash-Math-with-dc.md has been added to the project.

• Content Enhancement for Mathematical Operations

  • The contents now cover how to conduct simple math operations using dc, a tool that utilizes reverse Polish notation.
  • The new content also discusses the usage of bc, a utility that allows calculations and comparisons with arbitrary precision.
  • Improvements have been made to perform arithmetic operations without the requirement of external programs by using the innate abilities of bash.
  • Lastly, basic arithmetic via expr is also covered which includes its limitations with integers and its capability to support regular expressions.

[RhooneN]

First commit and first PR.