1
00:00:00,000 --> 00:00:04,970
In Python, arguments can be mainly of two kinds.

2
00:00:04,971 --> 00:00:06,970
We have non keyword arguments

3
00:00:06,971 --> 00:00:09,330
and we have keyword arguments.

4
00:00:09,331 --> 00:00:13,274
These two here are non keyword arguments.

5
00:00:13,275 --> 00:00:16,036
They don't have the keyword attached to them.

6
00:00:16,037 --> 00:00:18,933
However, if the case was this,

7
00:00:18,934 --> 00:00:21,800
[Author typing]

8
00:00:21,801 --> 00:00:23,236
things would still work

9
00:00:23,237 --> 00:00:28,028
the same it, but these two now would be called

10
00:00:28,029 --> 00:00:32,876
keyword arguments. Non keyword arguments, which is this one

11
00:00:32,877 --> 00:00:36,834
too are also referred to as positional arguments.

12
00:00:36,835 --> 00:00:39,648
They are called positional arguments because the

13
00:00:39,649 --> 00:00:42,992
way you communicate these two arguments to

14
00:00:42,993 --> 00:00:46,670
the function definition is based on position.

15
00:00:46,671 --> 00:00:50,432
So the first position 4 goes for A

16
00:00:50,433 --> 00:00:53,460
and the second 5 goes for B.

17
00:00:53,461 --> 00:00:55,338
So positional and non keyword

18
00:00:55,339 --> 00:00:57,444
arguments is the same thing.

19
00:00:57,445 --> 00:00:59,950
If it was keyword arguments,

20
00:00:59,951 --> 00:01:03,900
[Author typing]

21
00:01:03,910 --> 00:01:06,260
the position actually doesn't matter.

22
00:01:06,790 --> 00:01:11,368
So you can pass the value of b as the first argument if you

23
00:01:11,369 --> 00:01:16,332
like, and 4 will go to b and 5 will go to a.

24
00:01:16,333 --> 00:01:18,588
So as long as you pass them like

25
00:01:18,589 --> 00:01:21,532
that, keyword arguments, the position doesn't matter.

26
00:01:21,533 --> 00:01:24,226
You still would get the same output.

27
00:01:24,227 --> 00:01:26,514
Now, we also have default

28
00:01:26,515 --> 00:01:29,638
parameters, not arguments parameters.

29
00:01:29,639 --> 00:01:32,496
What that means is that a parameter might

30
00:01:32,497 --> 00:01:37,584
have a default value like that, which means

31
00:01:37,585 --> 00:01:42,116
you don't have to specify the value of

32
00:01:42,117 --> 00:01:44,560
that argument when you call the function.

33
00:01:44,561 --> 00:01:46,466
[Author typing]

34
00:01:46,466 --> 00:01:50,612
So we assigned 5 to a and b

35
00:01:50,613 --> 00:01:53,208
is 6 by default, therefore we get 30.

36
00:01:53,209 --> 00:01:56,926
a doesn't necessarily have to be a keyword argument,

37
00:01:56,927 --> 00:01:58,942
it can also be a non keyword argument.

38
00:01:58,943 --> 00:02:01,608
Here in the function call you

39
00:02:01,609 --> 00:02:03,570
still get the same output.

40
00:02:04,950 --> 00:02:11,318
Of course you can also assign a different value to B

41
00:02:11,319 --> 00:02:15,333
[Author typing]

42
00:02:15,334 --> 00:02:16,440
just like that.

43
00:02:17,870 --> 00:02:22,224
And lastly, you can also leave it like that,

44
00:02:22,225 --> 00:02:24,928
2 non keyword arguments and you

45
00:02:24,929 --> 00:02:27,790
still get the output correctly.

46
00:02:27,791 --> 00:02:31,162
Something you should know is that a default

47
00:02:31,163 --> 00:02:37,514
parameter cannot be before non default parameters.

48
00:02:37,515 --> 00:02:40,634
If you execute that, you'll get an error.

49
00:02:40,635 --> 00:02:44,474
It says non-default argument follows default argument.

50
00:02:44,475 --> 00:02:50,000
So non default follows default argument which is a.

51
00:02:51,410 --> 00:02:53,316
And that I think is some very

52
00:02:53,317 --> 00:02:56,710
good information about function arguments and parameters.

53
00:02:56,711 --> 00:03:00,433
[Outro sound]