1. 1. Error Handling in Rust
2. 2. demo
3. 3. Error Handling
4. 1. 3.1. Runtime error (panic) noticed during compilation
   2. 3.2. Divide by zero panick in function
   3. 3.3. Return error on failure
   4. 3.4. Divide by zero runtime panic
   5. 3.5. Divide by zero return error
   6. 3.6. factorial function, runtime panic
   7. 3.7. factorial create panic
   8. 3.8. Out of bound for vectors
   9. 3.9. Out of bound for arrays
   10. 3.10. Open files
   11. 3.11. Error handling on the command line
   12. 3.12. main returning Result - Set exit code
   13. 3.13. Error in internal function