teaching.codes

Control Flow: The if, elif, else Statements Summary

Summary

if elif else

Numeric comparison operators producing boolean results, example for a = 10 and b = 5 :

Op.	Meaning	Ex1.	Result	Ex2.	Result
<	is less than	a < b	False	a < 10	False
<=	is less than or equal to	a < b	False	a <= 10	True
>	is more than	a > b	True	a > 10	False
>=	is more than or equal to	a >= b	True	a >= 10	True
==	is equal to	a == b	False	a == 10	True
!=	is not equal to	a != b	True	a != 10	False

Modulo operator: %
Single 'if', followed by zero or more 'elif', and at most one 'else'

Boolean Logic
- 'and', 'or', 'not' keywords for building compound boolean expressions
- short circuit evaluation of 'and', 'or', 'not'
- DeMorgan's Law
Recursive Functions
- Self initiating functions
- Recursive factorial
- Recursive fibonacci
- Eliminating repetitive calls to fibonacci for values already calculated