[SOLVED] Examples for string find() in Python

[Soham1087]

I (beginner) am trying to find some examples but no luck.

Does anyone know of some examples on the net? I would like to know what it returns when it can't find, and how to specify from start to end, which I guess is going to be 0, -1.

From Scaler I got the following resolution, but still unsure about it. Need your valuable insights on it.

>>> x = "Hello World"
>>> x.find('World')
6
>>> x.find('Aloha');
-1

 

[KlausST]

Hi,

"-1" means "not found"
">=0" means the position in the string, beginning with 0

H --> pos 0
e --> pos 1
l --> pos 2
l --> pos 3
o --> pos 4
[ ] --> pos 5
W --> pos 6
o --> pos 7
...

Klaus

 

[Soham1087]

Reference - Scaler

 

[Aussie Susan]

Go to the source: https://docs.python.org/3/library/stdtypes.html
Search the page for 'find' and that is the definitive answer.
Of course you also need to understand slices if you want to use the optional parameters - but that is another story.
Susan

 

[tepalia02]

The example is correct. Start counting from 0. In "Hello world", the 0th character is 'H', 1st character is 'e' and similarly you can determine the positions of the rests. If you count from '0' you will see that the string 'World' starts from the 6th position. That's why you got the result 6 when you run

x.find('World')

Similarly you get -1 for your second code because 'aloha' is nowhere in the string 'Hello world'.