1
00:00:00,600 --> 00:00:01,200
Welcome back.

2
00:00:01,680 --> 00:00:04,710
Let's continue our understanding of it and float.

3
00:00:05,730 --> 00:00:12,330
We talked about the idea of these two data types and how we can use operations on them that we're familiar

4
00:00:12,330 --> 00:00:18,510
with from math class, plus a few ones that maybe we haven't seen before, such as modulo or the double

5
00:00:18,510 --> 00:00:22,230
slash or the double multiply for the power of.

6
00:00:23,310 --> 00:00:29,910
Now, this is really cool because we can get our computers to do well math for us like a calculator,

7
00:00:30,000 --> 00:00:30,420
right?

8
00:00:31,400 --> 00:00:38,990
But a programming language also provides for us different actions that we can perform now besides these

9
00:00:38,990 --> 00:00:44,120
ones, we also learned that there's a type action that we can take.

10
00:00:44,150 --> 00:00:51,170
There's a print action that we can take, but there's also specific math type functions that aren't

11
00:00:51,170 --> 00:00:54,620
and are able to use that are built into Python.

12
00:00:56,600 --> 00:01:04,370
Now, these are called Wilmuth functions and functions, something we'll talk about later on are these

13
00:01:04,370 --> 00:01:06,830
actions that we've been talking about.

14
00:01:07,770 --> 00:01:13,590
Remember our diagram here, we're starting to learn about the data types and the actions that we can

15
00:01:13,590 --> 00:01:17,500
perform on them now in most programming languages.

16
00:01:17,640 --> 00:01:22,070
These actions are called functions, and we have a whole section on them.

17
00:01:22,260 --> 00:01:26,190
But for now, there are some functions that we can use.

18
00:01:26,850 --> 00:01:28,600
So this is a print function.

19
00:01:28,740 --> 00:01:35,070
This is a type function, but there's specific math functions such as around.

20
00:01:36,440 --> 00:01:44,090
And you see right away, when I type, Reppel is a tool like an ad that hints and tells us what we can

21
00:01:44,090 --> 00:01:44,420
at.

22
00:01:45,430 --> 00:01:47,860
So says round and give me a number.

23
00:01:48,830 --> 00:01:53,040
And maybe and digit, but let's just worry about the first one for now.

24
00:01:53,300 --> 00:01:57,530
So around if I do three point one and I round here.

25
00:02:00,720 --> 00:02:01,090
Two.

26
00:02:01,920 --> 00:02:07,980
Well, that's not right, right, that's actually the result from up here, because we need to also

27
00:02:07,980 --> 00:02:16,320
tell it to perform with a function of print, hey, print to the screen, whatever the result of this

28
00:02:16,320 --> 00:02:16,560
is.

29
00:02:16,920 --> 00:02:19,830
And just to make things easier to see.

30
00:02:19,860 --> 00:02:21,240
I'm going to comment this out.

31
00:02:21,250 --> 00:02:24,120
So I'm just selecting everything and then pressing command.

32
00:02:24,750 --> 00:02:28,170
Or if you're on Windows control, if I click run.

33
00:02:30,060 --> 00:02:33,900
I get three because I'm rounding down the number.

34
00:02:34,790 --> 00:02:38,330
So let's say if it was three point nine, I click.

35
00:02:39,480 --> 00:02:42,360
And I get four again, I'm rounding the number.

36
00:02:43,850 --> 00:02:49,160
Another math function that's built into Python is something called a B.

37
00:02:49,160 --> 00:02:58,400
S, and you see right away that I get abs here and ABS returns the absolute value of the argument.

38
00:02:59,390 --> 00:03:04,700
And again, for those that aren't too familiar with math, an absolute value simply means, well, no

39
00:03:04,700 --> 00:03:05,510
negative numbers.

40
00:03:05,690 --> 00:03:09,770
So an absolute value of negative 20 is 20.

41
00:03:10,610 --> 00:03:15,380
And now because we know about math functions, I can start Googling, right?

42
00:03:15,500 --> 00:03:19,730
I can say, hey, I'm a python programmer and I want to learn about math functions.

43
00:03:19,940 --> 00:03:25,550
Well, I can go Python three math functions.

44
00:03:26,490 --> 00:03:34,440
And look at that right away, Google tells me that there's a ton that we can use, you don't have to

45
00:03:34,440 --> 00:03:35,600
memorize all of these.

46
00:03:35,610 --> 00:03:39,630
As a matter of fact, some of these I've never, ever used in my programming career.

47
00:03:40,200 --> 00:03:44,310
But it's good to know that they have these tools available to you.

48
00:03:44,530 --> 00:03:50,280
And as a programmer, this is something that you'll have to get used to, the idea that you won't actually

49
00:03:50,280 --> 00:03:59,760
memorize every single action that we can take for each data type, because some of these are very rarely

50
00:03:59,760 --> 00:04:01,980
used, some of them you'll never use in your career.

51
00:04:02,280 --> 00:04:05,400
The key is to understand how to Google them, how to find them.

52
00:04:05,850 --> 00:04:10,680
And throughout this course, I will show you the important ones that you're going to see over and over

53
00:04:10,920 --> 00:04:11,370
and over.

54
00:04:12,370 --> 00:04:18,490
But as a way for you to develop as a programmer, least you know that this is how you look for answers

55
00:04:18,490 --> 00:04:23,650
and find out that, hey, there's different math functions that we can use with numbers.

56
00:04:24,930 --> 00:04:27,510
All right, let's take a break and continue in the next video.