1. Recap: If, elif, else If <True condition>:
Do this
Elif <True condition>:
Otherwise, do this
Else:

2. Compound Statements and Random Numbers

3. Compound Statements if <condition 1> and <condition 2>
You can use compound statements to make sure a block will only run if there is more than one condition to be satisfied
if <condition 1> and <condition 2>
Then do this
if <condition 1> or <condition 2>
Will only run if both conditions are true
Will only run if at least one condition is true

4. When you’re finished…
How could you make your program start over again and re-prompt the user if the user put in a negative number
Add this to your existing code and me .py file at and turn in your grade sheet
Read about random numbers and the random module: pages 50-53

5. Creating while loops While some condition is true, repeat something
In coding: you might want to create a quiz show game, while there are questions left, keep playing the game.
The while loops lets you do this

6. What’s a while loop Runs while a certain condition is true Examples:
number = int(input("enter a number"))
while number !=5
number = int(input(“Guess another number”))

7. Generating Random Numbers
As much as users want consistent, predictable results from programs, sometimes what make the programs exciting is their unpredictability
Random numbers can supply an element of surprise
Python makes it easy to generate those random numbers
Python generates random numbers based on a formula, so they are not truly random.
This kind of random generation is called pseudorandom

8. Introducing the Craps Roller Program
Open the Craps Roller Program from the Chapter 3 Folder
Craps Roller replicated the dice roll of the fast-paced, casino game of craps. You don’t have to know anything about craps to appreciate the program.
Craps Roller just simulates the roll of two, six-sided dice. It displayed the value of each and their total.
To determine the dice values, the program uses functions that generates random number. Figure 3.2 shows the program

9. Importing the random Module
The first line of code in the program introduces the import statement
The statement allows you to import, or load, modules, in this case, the random module:
import random

10. Modules
Modules are files that contain code meant to be used in other programs. These modules usually group together a collection of programming related to one area. The random module contains functions related to generating random numbers and producing random results.
When you import a module, it was either installed as part of your Python installation, or was downloaded and installed later on, prior to your running the program that imports it.

11. Generating Random Numbers
You can generate random numbers using:
randint()
randrange()

12. randint() Function Produces a random integer
Notice the program doesn’t directly call randint()
It calls the function:
random.randint(1,6)
This accesses the function randint() through its module, random

13. Dot notation
You can call a function from an imported module by giving the module name, followed by a period, followed by the function call itself (similar to string methods).
This method of action is called dot notation.
Using dot notation random.randint() means the function randint() that belongs to the module random.
Dot notation can be used to access different elements of imported modules

14. randint() function
Requires two integer argument values and returns a random integer between those two values, which may include either of the argument values.
By passing the values 1 and 6 to the function, you are guaranteed to get back either 1,2,3,4,5 or 6

15. randrange() function produces a random integer
Use a single, positive integer argument
The function returns a random integer from, and including, 0, up to, but not including, that number
Example: random.randrange(6) produces either a 0,1,2,3,4, or 5

16. Where’s the 6 in the Craps Rollar?
randrange(6) is picking a random number from a group of 6 numbers – and the list starts with 0
If you add 1 to the result to get the right value for a die2:
die2=random.randrange(6)+1
As a result, die 2 gets either a 1,2,3,4,5, or 6.

17. Research:
What if you want to pick a random string out of a list? What function would you use in python? Do some research and turn in your answer.