1. Nate Brunelle Today: Conditional Decision Statements
CS1110
Nate Brunelle
Today: Conditional Decision Statements

2. Questions?

3. Last Time
Functions
Default Arguments

4. Expression vs. Statement
Expression: simplifies to a value 2
2+3
Amount_to_be_fancy(3**2)
Statement: Does something
x=3
print(‘Hello World!’)

5. Conditional decision Statement
if boolean expression:
action
elif boolean expression:
else:

6. Conditional decision Statement
if boolean expression:
action
elif:
another action
else:
yet another action
0 or more
0 or 1

7. Values and Types (not exhaustive)
Operators
-50 ,0 ,5, 30, 512
int
3+7, 3*7,
3-7, 3/7
0.5, 1.2,
float
+, *, -, /, //, %, **, compare
‘hi’, “hi”, ‘hello world! ✃’
str
+, * int
Print, input
function
print()
True, False
bool
and, or, not

8. and, or, not examples x<2 and x>0 x<0 or x>2 not x>2
When all things are true
x<0 or x>2
When any of the things are true
not x>2
When the thing is false

9. and, or, not and or not True if all things are True
False if any things are False or
True if any things are True
False if all things are False
not
True if the thing was False
False if the thing was True