Make Functions.

1. Programming
Meeting #4
EEC: T.Hideyuki

2. Programming
Meeting #4
Review
Make Functions
What's next?

3. Programming
Meeting #4
Review
N = 3
12.8 * 5.6
“Programming”
puts()
Math.sqrt()
open()
N = N + 1
7 % 2

4. Programming
Meeting #4
Make Functions

5. Programming
Meeting #4
Make Functions
sum(5, 6, 7)
mean(5, 6, 7)

6. Programming
Meeting #4
Make Functions
sum(5, 6, 7)
mean(5, 6, 7)
18
6

7. Programming
Meeting #4
Make Functions
function( )input

8. Programming
Meeting #4
Make Functions
output

9. Programming
Meeting #4
Make Functions
sum(5, 6, 7)
mean(5, 6, 7)

10. x = sum(5, 6, 7)
y = mean(5, 6, 7)
18
6
Make Functions
Programming
Meeting #4

11. puts( )
puts( )x
y
18
6
Make Functions
Programming
Meeting #4

12. Programming
Meeting #4
sum(5,6,7) mean(5,6,7)
Make Functions
Process

13. Programming
Meeting #4
sum(5,6,7) mean(5,6,7)
5 + 6 + 7 (5 + 6 + 7) / 3
Make Functions

14. Programming
Meeting #4
Make Functions
How to make a function?

15. Programming
Meeting #4
name input
output
process
return
end
Make Functions
def
in Ruby
( )

16. Programming
Meeting #4
sum(5,6,7) mean(5,6,7)
5 + 6 + 7 (5 + 6 + 7) / 3
Make Functions

17. Programming
Meeting #4
sum(5,6,7)
name input
output
process
return
end
Make Functions
def ( )

18. Programming
Meeting #4
sum(5,6,7)
def ( )
output
process
return
end
sum a, b, c
Make Functions

19. Programming
Meeting #4
sum(5,6,7)
def ( )
output
process
return
end
sum a, b, c
Make Functions

20. Programming
Meeting #4
sum(5,6,7)
def ( )
outputreturn
end
a, b, c
n = a + b + c
Make Functions
sum

21. Programming
Meeting #4
sum(5,6,7)
def ( )
return
end
a, b, c
n = a + b + c
n
Make Functions
sum

22. Programming
Meeting #4
sum(5,6,7)
def sum(a, b, c)
n = a + b + c
return n
end
Make Functions

23. Programming
Meeting #4
sum(5,6,7)
def sum(a, b, c)
return a+b+c
end
Make Functions

24. Programming
Meeting #4
sum(5,6,7) mean(5,6,7)
5 + 6 + 7 (5 + 6 + 7) / 3
Make Functions

25. Programming
Meeting #4
mean(5,6,7)Make Functions
name input
output
process
return
end
def ( )

26. Programming
Meeting #4
mean(5,6,7)
def ( )
output
process
return
end
mean a, b, c
Make Functions

27. Programming
Meeting #4
mean(5,6,7)
def ( )
return
end
mean a, b, c
n = a + b + c
n = n / 3
n
Make Functions

28. Programming
Meeting #4
mean(5,6,7)
def mean(a, b, c)
n = a + b + c
n = n / 3
return n
end
Make Functions

29. Programming
Meeting #4
mean(5,6,7)
def mean(a, b, c)
n = sum(a, b, c)
n = n / 3
return n
end
Make Functions

30. Programming
Meeting #4
mean(5,6,7)
def mean(a, b, c)
n = sum(a, b, c) / 3
return n
end
Make Functions

31. Programming
Meeting #4
mean(5,6,7)
def mean(a, b, c)
return sum(a, b, c)/3
end
Make Functions

32. Programming
Meeting #4
mean(5,6,7)
def mean(a, b, c)
return sum(a, b, c)/3.0
end
Make Functions
technique

33. Programming
Meeting #4
Make Functions technique
5 / 2
5.0 / 2
5 / 2.0
5.0 / 2.0
2
2.5
(Precise)

34. Programming
Meeting #4
Make Functions
Let’s Try It in Ruby!
https://sites.google.com/site/programmingmeeting/

35. Programming
Meeting #4
def mean(a, b, c)
return sum(a, b, c)/3.0
end
def sum(a, b, c)
return a+b+c
end
Make Functions
Today’s
Functions

36. Programming
Meeting #4
Make Functions
Today’s
Functions
sum(1,2,3)
sum(7.4, 3, 5.2)
sum(8)
sum(1,1,1,1)
mean(3,2,1)
mean(6,9,11)
mean(1.2, 5.8, 8)
mean(120)
mean(6,5,4,3)

37. Programming
Meeting #4
What's next?

38. Programming
Meeting #4
What's next?
Condition

39. Programming
Meeting #4
Questions

40. Programming
Meeting #4
Thank you for Meeting!