Python 3 - String rfind() Method

Description

The rfind() method returns the last index where the substring str is found, or -1 if no such index exists, optionally restricting the search to string[beg:end].

Syntax

Following is the syntax for rfind() method −

str.rfind(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 &minus This is the ending index, by default its equal to the length of the string.

Return Value

This method returns last index if found and -1 otherwise.

Example

The following example shows the usage of rfind() method.

#!/usr/bin/python3

str1 = "this is really a string example....wow!!!"
str2 = "is"

print (str1.rfind(str2))
print (str1.rfind(str2, 0, 10))
print (str1.rfind(str2, 10, 0))

print (str1.find(str2))
print (str1.find(str2, 0, 10))
print (str1.find(str2, 10, 0))

Result

When we run above program, it produces the following result −

5
5
-1
2
2
-1