Identifying and Correcting Errors (Unit 1.4)

Identifying and Correcting Errors Video #1 Notes

Programmers run into errors many times and it is a part of the programming process
Logic Error: when the programmer makes a mistake in the algorithm that causes an unexpected result
Syntax Error: a typo in the code that doesn’t let the program to run or compile
Run-Time Error: the program fails while running, it can run but cannot finish the processes, also called a bug
Overflow Error: when the result is too large for the range
Takeaway: How to identify an error and understand the 4 main errors

How to correct a syntax error: use the IDEs’ suggestion and guidance of where the error is happening
How to correct logic errors:
- use Test Cases and try out different inputs
- Hand Tracing: writing out the values of variables within the loop as it iterates to determine if the result is correct
- Add Extra Outputs: help to find and fix the error
- Some IDEs show visualizations and debuggers to help correct errors
Takeaway: How to correct errors and ways to correct and find errors

Programmers start thinking of and does testing from start to finish
Testing to make sure the requirements are met
Minimum number example: C wouldn’t work because the minimum number would be rewritten every single round
Temperature example: B because the sign should have been less than or equal to
The testing is used to revise, refine, and improve the program
Testing is used to find and fix problems in the program
Takeaway: Identify inputs and intended outputs by testing the program

Question 3 Corrections: the Number 7 results in the correct answer. But number 8 results in check minus instead of check.