The find() method returns the index of first occurrence of the substring (if found). If not found, it returns -1.
Example
#!/usr/bin/python3
# -*- coding: UTF-8 -*-
str = "Associate professor in computer science and also a joint professor in information science"
# From the beginning, found the 1st occurrence
print (str.find('professor'))
# For the index of 30 and after, found the 2nd occurrence
print (str.find('professor', 30))
# For the index of 60 and after, not found and return -1
print (str.find('professor', 60))
Output:
10
57
-1
Syntax
str.find(substr[, start[, end]] )
Parameters
| Name | Description |
| substr | The substring to be searched in the string |
Return Value
It returns the index if found and -1 otherwise.