1
00:00:13,490 --> 00:00:16,700
Hello and welcome to the Golang programming language course.

2
00:00:17,990 --> 00:00:23,570
In the previous session, we talked about integer numbers and indecision.

3
00:00:23,840 --> 00:00:27,500
We want to talk about the other data types concept.

4
00:00:34,140 --> 00:00:45,540
Floating point numbers, a floating point number or a float is used to represent real numbers that cannot

5
00:00:45,540 --> 00:00:54,660
be expressed as integers, real numbers include all rational and irrational numbers, and because of

6
00:00:54,660 --> 00:01:03,180
these floating point numbers can contain a fractional part such as seven point five or minus 100 in

7
00:01:03,180 --> 00:01:04,860
twenty three point forty five.

8
00:01:05,850 --> 00:01:12,750
For the purposes of thinking of a float in the go curriculum, it is a number that contains a decimal

9
00:01:12,750 --> 00:01:16,530
point and go language.

10
00:01:16,650 --> 00:01:20,880
Floating point numbers are divided into two categories.

11
00:01:21,150 --> 00:01:32,910
As shown in the below diagram, fellow Terry to thirty two bits or four bytes and floats 64 64 bits

12
00:01:32,910 --> 00:01:34,230
or eight points.

13
00:01:34,560 --> 00:01:43,380
Now let's go to this school to illustrate how to use a floating point numbers like we did with integers.

14
00:01:43,650 --> 00:01:46,980
We convert by floating point numbers in a simple way.

15
00:01:47,400 --> 00:01:50,880
First defined two variables by shorthand declaration.

16
00:01:51,660 --> 00:02:01,290
A column equals and initialize it by a floating point value, for example, thirty five point seventy

17
00:02:01,320 --> 00:02:11,550
eight, and define another variable like B column equals, for example, forty six point twenty six.

18
00:02:13,890 --> 00:02:16,980
Now you want to subtract these variables together.

19
00:02:17,430 --> 00:02:24,840
So first, define another variable like see column equals B minus A

20
00:02:27,510 --> 00:02:39,060
and now display the result value and type of C variable so that if a initialize person if because type

21
00:02:39,060 --> 00:02:46,110
of variable A and B is below, so be used from person if asked, formatted string back is less and and

22
00:02:46,110 --> 00:02:49,620
said, Hey, go to the next line.

23
00:02:50,040 --> 00:02:59,460
F f b initialize % f backslash end and set b.

24
00:03:01,940 --> 00:03:13,610
And if we want to display the result of B minus A, so we right % f for this pretty variable B minus

25
00:03:14,000 --> 00:03:25,460
person, f for disability valuable a equals person, f for variable C because the values are valid,

26
00:03:25,460 --> 00:03:27,940
but it's a and b are decimal.

27
00:03:27,950 --> 00:03:33,440
The subtraction of two variables and b from each other will also be a decimal value.

28
00:03:33,890 --> 00:03:38,120
So if you use five percent if as icing format for the C variable.

29
00:03:39,070 --> 00:03:49,750
And we said B comma, a comma, c now go to the next line and display type of C value that saw B write

30
00:03:49,750 --> 00:04:01,540
f f tie or C column person T uppercase and said C value of it.

31
00:04:02,500 --> 00:04:10,330
Put it back in here and reformat the call, save the project and execute the program.

32
00:04:10,810 --> 00:04:14,680
So go to terminal and execute the program by the comment.

33
00:04:14,680 --> 00:04:18,430
Go round the backslash mean that goal.

34
00:04:20,500 --> 00:04:30,880
Now we can see the output eight equals thirty five point seventy eight and B equals forty six point

35
00:04:30,880 --> 00:04:39,400
twenty six and B minus eight means forty six point twenty six, minus three.

36
00:04:39,400 --> 00:04:44,500
Five point seventy eight equals to ten point forty eight.

37
00:04:44,860 --> 00:04:48,370
And type of C is float sixty four.

38
00:04:50,190 --> 00:04:50,580
OK.

39
00:04:50,730 --> 00:04:57,960
In this edition, we could define floating point variables, initialize them and display in order not

40
00:04:57,960 --> 00:04:59,460
to prolong the time of decision.

41
00:04:59,490 --> 00:05:03,300
We will finish it and we'll continue the content in the next session.

42
00:05:03,390 --> 00:05:03,900
Goodbye.