Python Python string find() examples

[Hilton D]

I'm looking for examples, but I'm not finding any.
Are there any examples on the internet? I'd like to know what it returns when it can't find something, as well as how to specify the starting and ending points, which I assume will be 0, -1.

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

Could you please help me? But I'm not convinced.

 

[menator01]

from example string.find will return the starting index of the first occurrence.If no match is found it will return -1
If given a start and end index it will look for the substring starting at index_start and search to index_end.

string = 'in the ballpark'
x = string.find('ball')
print(f'''ball starts at index {x}.
index {x} is the letter {string[x]}.
remember indexes will start at 0.
this will be the letter {string[0]}.''')


string2 = 'This is another string about stringfind'
start = 5
end = len(string2)-1
x = string2.find('string', start, end)
print(f'''
This search started at index {start} which is the letter {string2[start]}
and ends with the index {end} which is the letter {string2[end]}.
The substring is found at index {x} which is the letter {string2[x]}.
''')
print(f'''
We can also printing from the index using string slice such as string2[:x] will return
{string2[:x]}
or string2[x:] which will return
{string2[x:]}
''')

output

This search started at index 5 which is the letter i
and ends with the index 38 which is the letter d.
The substring is found at index 16 which is the letter s.


We can also printing from the index using string slice such as string2[:x] will return
This is another

or string2[x:] which will return
string about stringfind