1. Welcome back to Software Development!

2. Random Numbers

3. Random Numbers
What is a random number?

4. Random Numbers
What is a random number?
Basically a roll of the dice

5. Random Numbers What is a random number? Basically a roll of the dice
In a program, is a way of simulating chance or uncertainty

6. Random Numbers What is a random number?
Basically a roll of the dice
In a program, is a way of simulating chance or uncertainty
.NET gives us a way of generating random numbers

7. Random Numbers What is a random number?
Basically a roll of the dice
In a program, is a way of simulating chance or uncertainty
.NET gives us a way of generating random numbers
Random class (in the System namespace)

8. Random Numbers What is a random number?
Basically a roll of the dice
In a program, is a way of simulating chance or uncertainty
.NET gives us a way of generating random numbers
Random class (in the System namespace)
Supports both int and double

9. Random Numbers What is a random number?
Basically a roll of the dice
In a program, is a way of simulating chance or uncertainty
.NET gives us a way of generating random numbers
Random class (in the System namespace)
Supports both int and double
Seed

10. Random Numbers What is a random number?
Basically a roll of the dice
In a program, is a way of simulating chance or uncertainty
.NET gives us a way of generating random numbers
Random class (in the System namespace)
Supports both int and double
Seed: lets you start the random # sequence the same each time

11. Random Numbers What is a random number?
Basically a roll of the dice
In a program, is a way of simulating chance or uncertainty
.NET gives us a way of generating random numbers
Random class (in the System namespace)
Supports both int and double
Seed: lets you start the random # sequence the same each time
Range

12. Random Numbers What is a random number?
Basically a roll of the dice
In a program, is a way of simulating chance or uncertainty
.NET gives us a way of generating random numbers
Random class (in the System namespace)
Supports both int and double
Seed: lets you start the random # sequence the same each time
Range: can say give me random # between this and that

13. Random Numbers

14. Random Numbers
Random rndNum = new Random();

15. Random Numbers
Random rndNum = new Random();
int intNum;

16. Random Numbers Random rndNum = new Random(); int intNum;
intNum = rndNum.Next(); // no bound

17. Random Numbers Random rndNum = new Random(); int intNum;
intNum = rndNum.Next(); // no bound
intNum = rndNum.Next(20); // upper bound

18. Random Numbers Random rndNum = new Random(); int intNum;
intNum = rndNum.Next(); // no bound
intNum = rndNum.Next(20); // upper bound
intNum = rndNum.Next(10,20); // lower & upper bound

19. Random Numbers

20. Random Numbers
Random rndNum = new Random();

21. Random Numbers
Random rndNum = new Random();
double dblNum;

22. Random Numbers Random rndNum = new Random(); double dblNum;
dblNum = rndNum.NextDouble(); // no bound

23. Random Numbers Random rndNum = new Random(); double dblNum;
dblNum = rndNum.NextDouble(); // no bound
dblNum = rndNum.NextDouble(20); // upper bound

24. Random Numbers Random rndNum = new Random(); double dblNum;
dblNum = rndNum.NextDouble(); // no bound
dblNum = rndNum.NextDouble(20); // upper bound
dblNum = rndNum.NextDouble(10,20); // lower & upper bound

25. Your Turn

26. Your Turn
In your teams, write a program that:

27. Your Turn In your teams, write a program that:
Generates a randomized number

28. Your Turn In your teams, write a program that:
Generates a randomized number
Display the random number

29. Your Turn In your teams, write a program that:
Generates a randomized number
Display the random number
Based on that number

30. Your Turn In your teams, write a program that:
Generates a randomized number
Display the random number
Based on that number
Using a switch statement

31. Your Turn In your teams, write a program that:
Generates a randomized number
Display the random number
Based on that number
Using a switch statement
Print a different message for each number

32. Your Turn In your teams, write a program that:
Generates a randomized number
Display the random number
Based on that number
Using a switch statement
Print a different message for each number
You must support at least 3 different output messages

33. Your Turn In your teams, write a program that: IF you get stuck…
Generates a randomized number
Display the random number
Based on that number
Using a switch statement
Print a different message for each number
You must support at least 3 different output messages
IF you get stuck…

34. Your Turn In your teams, write a program that: IF you get stuck…
Generates a randomized number
Display the random number
Based on that number
Using a switch statement
Print a different message for each number
You must support at least 3 different output messages
IF you get stuck…
Switch statement: you can use the SwitchDemo program on page 52 as guidance

35. Your Turn In your teams, write a program that: IF you get stuck…
Generates a randomized number
Display the random number
Based on that number
Using a switch statement
Print a different message for each number
You must support at least 3 different output messages
IF you get stuck…
Switch statement: you can use the SwitchDemo program on page 52 as guidance
Random numbers: you can use the Roller program on page 56 as guidance

36. Your Turn In your teams, write a program that: IF you get stuck…
Generates a randomized number
Display the random number
Based on that number
Using a switch statement
Print a different message for each number
You must support at least 3 different output messages
IF you get stuck…
Switch statement: you can use the SwitchDemo program on page 52 as guidance
Random numbers: you can use the Roller program on page 56 as guidance
You have the remainder of the period…

37. Clear and Unclear Windows