Python String rfind() Method

Description

The rfind() method returns the index of the last occurrence of a substring, or -1 if the substring does not exist. You can optionally limit the search to the string [beg:end].

Syntax

The syntax of the rfind() method is as follows:

var.rfind(sub, beg = 0, end = len(string))

Parameters

• sub – Specifies the string to search for.
• beg – The starting index, which defaults to 0.
• end – The ending index, which defaults to the length of the string.

Return Value

This method returns the last index if the result is found, otherwise returns -1.

Example

The following example demonstrates the use of the rfind() method.

var = "Explicit is better than implicit."

var1 = var.rfind('i')
print ("Original string:", var)
print ("Last index of 'i':", var1)

var2 = var.rfind('x', 10, -1)
print ("Last index of 'x':", var2)

When you run this program, it will produce the following output −

Original string: Explicit is better than implicit.
Last index of 'i': 30
Last index of 'x': -1

Since the letter “x” does not exist starting from the 10th index, “-1” is returned.