Python String find() method
The find() method returns the lowest index of the substring if it is found in given string. If its is not found then it returns -1.
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 start and end indexes are not provided then by default it takes 0 and length-1 as starting and ending indexes where ending indxes is not included in our search.
Returns:
returns the lowest index of the substring if it is found in given string. If it’s not found then it returns -1.
The find() method is similar to index(). The only difference is find() returns -1 if searched string is not found and index() throws an exception in this case.
CODE 1
word = 'geeks for geeks' # returns first occurrence of Substring result = word.find( 'geeks' ) print ( "Substring 'geeks' found at index:" , result ) result = word.find( 'for' ) print ( "Substring 'for ' found at index:" , result ) # How to use find() if (word.find( 'pawan' ) ! = - 1 ): print ( "Contains given substring " ) else : print ( "Doesn't contains given substring" ) |
Substring 'geeks' found at index: 0 Substring 'for ' found at index: 6 Doesn't contains given substring
CODE 2
word = 'geeks for geeks' # Substring is searched in 'eks for geeks' print (word.find( 'ge' , 2 )) # Substring is searched in 'eks for geeks' print (word.find( 'geeks ' , 2 )) # Substring is searched in 's for g' print (word.find( 'g' , 4 , 10 )) # Substring is searched in 's for g' print (word.find( 'for ' , 4 , 11 )) |
10 -1 -1 6
Last Updated on July 24, 2021 by admin