Week 2

1. Functions

4. colon
start with ‘def’
function name
arguments
deftwotimes(n):
return2*n
‘return’ precedes
the value to be sent back
No declaration of types
of function or arguments

5. New definition?

6. New definition?

7. New definition?

8. Popquiz!
What happens now?

9. Popquiz!
What happens now?

10. No ‘overloading’

11. More functions

12. What does this mean?

13. Functions can be arguments

14. Functions can be arguments

15. We can also use an “anonymous function”

16. Using parameters

27. Why Python?
•Easy to learn syntax
•Built-in datatypes for lists, strings etc.
•Runs on many types of machines
•Many scientific librartes (SciPy, NumPy)
•Large community of scientists using it
•#1 programming language in universities
•Shell mode for experimentation

28. Why Python?
•Easy to learn syntax
•Built-in datatypes for lists, strings etc.
•Runs on many types of machines
•Many scientific librartes (SciPy, NumPy)
•Large community of scientists using it
•#1 programming language in universities
•Shell mode for experimentation
•Awesome Excel integration