Why this code output 6 m=[ [1, 2, 3], [4, 5 , 6] ] print(m[1][2])

Question

Why this code output 6
m=[
[1, 2, 3],
[4, 5 , 6]
]
print(m[1][2])

Answer 1

ZIZO Abd alkawy

That's 2D array so

m[1][2] => 1 row index and 2 col index

vertical lines -> columns
horizontal lines -> rows

m[0][0] = 1
m[0][1] = 2
m[0][2] = 3

m[1][0] = 4
m[1][1] = 5
m[1][2] = 6

Answer 2

ZIZO Abd alkawy

Column
0 1 2
Row 0 [1, 2, 3]
1 [4, 5, 6]

The first index in m[1][2] refers to the row and the 2nd index refers to the column

Answer 3

A͢J I didn't get it

Answer 4

The element index in a parent array or othewise equates to :

[1,[1,2]] which is the third element in the second array, namely 6

Answer 5

This is simple.
Start the count from 0, not 1.

Answer 6

ZIZO Abd alkawy

2D array is a matrix of row and column so m has 2 rows and 3 columns

1st rows has values 1, 2, 3
2nd rows has values 4, 5, 6

So 1 is at index 0 and 0
2 is at index 0 and 1
3 is at index 0 and 2

Answer 7

A͢J Jaz get it thanks 😊

Answer 8

ZIZO Abd alkawy

This is a plain array or you can say list in python which contains normal value as well as a list. Here things will be treat as a 1 D list

"string"[2][0] = r

"string"[2][1] #error because there is no index 1

Answer 9

You are using nested lists so when saying m[1][2] you are saying in m, the second list (cause the first one is 0), the 3rd object
Here is more clear explanation:
m = [
[1,2,3]
[4,5,6]
]
m[1] is [4,5,6]
m[2][3] is the 3rd index in m[1]
Which is 6

So m[1] returns the 2nd list in the og list
And ( m[1] )[3] is the 3rd object in said list
So 6

Answer 10

Is this code also like the last one
number=3
things=["string", 0, [1 , 2, number],4.56]
print(things[1])
print(things[2])
print(things[2][2]) this line output 3
Why there in no rows
When I make the first 2 0 it outputs r
Why it should output t

Jaz A͢J

Answer 11

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Answer 12

*Index starts at 0

You access m[1], Which is the second item in the list (because to access the first one you have to do m[0])
You now have a list, You now access the 2nd index (or third item)of said list which is 6. Take a look at lists in the Python Lessons :)

Answer 13

AYO