Index () Python

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Describe

The index () method detects whether a substring contains substrings in str, and if you specify beg (start) and end (end) ranges, the check is contained within the specified range, just like the Python find () method, except that STR does not report an exception in string.

Grammar

str.index(str, beg=0, end=len(string))

Parameters

• STR--Specifies the string to retrieve
• Beg--Start index, default is 0
• End--ending index, default to string length

return value

Returns the first index if the substring exists or an error

Instance

Example code:

#!/usr/bin/python3="Runoob example....wow!!!"="exam";print (str1.index(str2))print5))print10))

Output:

77Traceback (most recent call last):  "test.py"8in<module>    print10))ValueErrornot found

Index () Python