Coding Help

[simonsadiq]

For the following code:

1 2	my_string = "0123456789" print(my_string[3])

I get the output '3', which I understand
but when I run:

1	print(my_string[3: 2: 4])

I get a blank space, I don't understand why I get a blank space as output, can anyone explain? I'll be extremely grateful

[menator01]

See this post

https://python-forum.io/Thread-String-slicing--27238

[pyzyx3qwerty]

String slicing specifies how to cut the string. Used in square brackets, the numbers are written in order of
[Position of the letter where it should start : Position where it should stop : Jumping]
(Important note : Slicing starts from 0 ,i.e., the first letter is 0, second is 1 etc.)
Let's take your example

1 2	my_string = "0123456789" print(my_string[3])

Here, you have written 3, so it will display the the third element, which is 3

1 2	my_string = "0123456789" print(my_string[3:5])

In the above line, the output will be 34. It won't display 345, as it just displays the first number and the numbers in between , not the ending one

1 2	my_string = "0123456789" print(my_string[3:9:2])

Here, it will display 357 as the "2" in the end makes the string jump by 2 - if it was 1, it would be 345678
Note - default value is always set as 1

---

Now let's see your problem -

1 2	my_string = "0123456789" print(my_string[3: 2: 4])

There is a problem in this :

1. You can't reverse a string by doing the think you have done - to reverse you got to do like this
   

   1 2	str1 = "abcdefghijk" print(str1[::-1])

   So, these are the reasons your output is coming blank

[buran]

There is only one element in between them it can't just jump by 4, can it?

Actually the problem is that end - 2 is less than start - 3, step - 4 has nothing to do with the problem, e.g.

1 2 3

>>> my_string = "0123456789" >>> print(my_string[3:4:4]) 3

start is included in the output, up to, but not including end.

[pyzyx3qwerty]

There is only one element in between them it can't just jump by 4, can it?

Actually the problem is that end - 2 is less than start - 3, step - 4 has nothing to do with the problem, e.g.

1 2 3

>>> my_string = "0123456789" >>> print(my_string[3:4:4]) 3

start is included in the output, up to, but not including end.

Thanks, I changed my post

[simonsadiq]

Now clear to me, thankyou so much all of you for great help!
I am really grateful for your time and efforts to help and guide me, salute!