1. Can you pick 3 errors from this
Starter
Can you pick 3 errors from this
Temp = input("What is the temperature in the house?") if (int(Temp) <= 15): Print ("The temperature is ", Temp, "degrees. Time to put the heating on") else: print "The temperature is ", Temp, "degrees. The heating is going off"

2. Can you pick 3 errors from this
Starter
Can you pick 3 errors from this
Temp = input("What is the temperature in the house?") if (int(Temp) <= 15): Print ("The temperature is ", Temp, "degrees. Time to put the heating on") else: print ("The temperature is ", Temp, "degrees. The heating is going off“)
How tedious is that?

3. Lesson Outcomes
2.1.3 Be able to identify differentiate between types of error in programs
2.1.4 Be able to interpret error messages and identify, locate and fix errors in a program.
2.1.7 Be able to make effective use of tools offered in an integrated development environment [watcher, break points, single step, step throughs]
What causes error messages
All of should be able to recall different error types
All of you should be able to recall error messages in python

4. Making errors... Making mistakes is okay. It happens all the time!
But you don’t release a game with errors

5. Errors in programs and being able to handle them.
There are basically 3 types
Of error…
Logic
Syntax
Runtime

6. Errors in programs and being able to handle them.
An error in the design of the program, wrong programming or wrong logic. (May not produce an error – just wrong outcome) often no obvious error is flagged up
Often due to mistake in the algorithm or wrong data type.
Format errors failing to follow the grammar rules of the programming language used.

7. What errors?
print hello world
syntax

8. What errors? Name = 'Al' print(‘You can call me ' + name)
Runtime error

9. What errors? spam = 'THIS IS IN LOWERCASE.' spam = spam.lowerr()
Runtime error

10. What errors? x = 3 y = 4 average = x + y / 2 print(average)

11. What errors? spam = ['cat', 'dog', 'mouse'] print(spam[6])
Runtime error

12. Errors in programs and being able to handle them.
Type Error
Runtime
NameError
ZeroDivisionError
KeyBoardInterrupt
When a name is used that is not known about (often a variable name that is misspelt).
Dividing a number by zero.
When a program is interrupted from the keyboard by pressing control+c.
An error occurs when the program is running.
When an operation is attempt that is invalid for that type of data.
Specific to python

13. Odd task alert
Go away and try to make mistakes: Make an example of: A runtime error A syntax error A logic error

14. Trace Table
A technique used to test algorithms to see if any logic errors occur when the algorithm is processed.

15. Testing for errors before and during the coding stages

16. Testing for errors during the execution of code
Breakpoints
Steps
Watches

17. Activity 4.1 and 4.2
4.3
4.4
4.5 and 4.6