python3 string find method

Description
It determines if string str occurs in string, or in a substring of string if starting index beg and ending index end are given.

Syntax
str.find(str, beg=0, end=len(string))
Parameters
str − This specifies the string to be searched.

beg − This is the starting index, by default its 0.

end − This is the ending index, by default its equal to the length of the string.

Return Value
Index if found and -1 otherwise.

Example:

Python 3.6.6 (v3.6.6:4cf1f54eb7, Jun 27 2018, 03:37:03) [MSC v.1900 64 bit (AMD64)] on win32

Type "copyright", "credits" or "license()" for more information.

>>> str1 = "This is a string to test the find method."

>>> str2 = "string"

>>> print(str1.find(str2))

10

>>> print(str1.find(str2,10))

10

>>> print(str1.find(str2,10+1))

-1

>>>