1. Python
  2. Rindex () string in python

Rindex () string in python

Syntax :

str.find (sub, start, end)

Parameters:

sub: It`s the substring which needs to be searched in the given string.
start: Starting position where sub is needs to be checked within the string.
end: Ending position where suffix is ​​needs to be checked within the string.

NOTE. If no start and end indexes are provided, then it defaults to 0 and length-1 as start and end indices, where end indices are not included in our search.

Return:

Returns the highest index of the substring inside the string if substring is found. Otherwise it raises an exception.

Examples :

 input: text = `geeks for geeks` result = text.rindex (` geeks `) output: 10 input: text =` geeks for geeks` result = text.rindex (`ge`) output: 10

Errors and exceptions:
ValueError : This error occurs when no argument string is found in the target string.

CODE 1

Output: 

 Substring `geeks`: 10

Code 2

# Python -code to demonstrate how rindex () works

text = ` geeks for geeks`

 

result = text.rindex ( `geeks` )

print ( "Substring` geeks`: " , result)

# Python code to show the error using rindex ()

text = `geeks for geeks`

  

result = text.rindex ( `pawan` )

print ( "Substring` pawan`: " , result)

Error: 

 Traceback (most recent call last): File "/ home / da dc555d90806cae90a29998ea5d6266.py ", line 6, in result = text.rindex (` pawan`) ValueError: substring not found

CODE 3

# Python code to demonstrate how rindex () works
# with the specified range

quote = `geeks for geeks`

 
# The substring is searched for in & # 39; geeks for geeks & # 39;

print (quote.rindex ( `ge` , 2 ))

  
# The substring is searched in the range from 0 to 10

print (quote.rindex ( `geeks` , 0 , 10 ))

Output: 

 10 0