Python String | find()
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.
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") |
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Output :
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)) |
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Output :
10 -1 -1 6
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