Python | String startswith()
Python String startswith() method returns True if a string starts with the specified prefix (string). If not, it returns False.
Python String startswith() Method Syntax
Syntax: str.startswith(prefix, start, end)
Parameters:
- prefix: prefix ix nothing but a string that needs to be checked.
- start: Starting position where prefix is needed to be checked within the string.
- end: Ending position where prefix is needed to be checked within the string.
Return: Returns True if strings start with the given prefix otherwise returns False.
Python String startswith() Method Example
Here we will check if the string is starting with “Geeks” then it will return the True otherwise it will return false.
Python3
var = "Geeks for Geeks" print (var.startswith( "Geeks" )) print (var.startswith( "Hello" )) |
Output:
True False
Example 1: Python String startswith() Method Without start and end Parameters
If we do not provide start and end parameters, then Python String startswith() method will check if the substring is present at the beginning of the complete String.
Python3
text = "geeks for geeks." # returns False result = text.startswith( 'for geeks' ) print (result) # returns True result = text.startswith( 'geeks' ) print (result) # returns False result = text.startswith( 'for geeks.' ) print (result) # returns True result = text.startswith( 'geeks for geeks.' ) print (result) |
Output:
False True False True
Example 2: Python String startswith() Method With start and end Parameters
If we provide start and end parameters, then startswith() will check, if the substring within start and end starts matches with the given substring.
Python3
text = "geeks for geeks." result = text.startswith( 'for geeks' , 6 ) print (result) result = text.startswith( 'for' , 6 , 9 ) print (result) |
Output:
True True
Example 3: Checking if String starts with one of many items using Python String startswith() Method
We can also pass a tuple instead of a string to match with in Python String startswith() Method. In this case, startswith() method will return True if the string starts with any of the item in the tuple.
Python3
string = "GeeksForGeeks" res = string.startswith(( 'geek' , 'geeks' , 'Geek' , 'Geeks' )) print (res) string = "apple" res = string.startswith(( 'a' , 'e' , 'i' , 'o' , 'u' )) print (res) string = "mango" res = string.startswith(( 'a' , 'e' , 'i' , 'o' , 'u' )) print (res) |
Output:
True True False
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