The startswith function in Python yields a Boolean value, either True or False. It evaluates to True if the string commences with the specified prefix; otherwise, it will return False. This method accepts two parameters: 'start' and 'end'. The 'start' parameter indicates the index from which the search begins, while the 'end' parameter denotes the index at which the search concludes.
Signature
startswith(prefix[, start[, end]])
Parameters
prefix : A string which is to be checked.
start : Start index from where searching starts.
end : End index till there searching performs.
Both start and end are optional parameters.
Return
It returns boolean value either True or False.
Let's explore several examples of the startswith method to gain a better understanding of its functionality.
Python String startswith Method Example 1
To begin with, let's develop a straightforward example that outputs True if the specified string begins with the given prefix.
# Python String startswith() method
# Declaring variable
str = "Hello World"
# Calling function
str2 = str.startswith("Hello")
# Displaying result
print (str2)
Output:
Python String startswith Method Example 2
In the event that the string does not commence with the specified prefix, the function will yield a result of False. Refer to the example provided below.
# Python String startswith() method
# Declaring variable
str = "Hello World"
# Calling function
str2 = str.startswith("Python") # False
# Displaying result
print (str2)
Output:
Python String startswith Method Example 3
This approach accepts three arguments. The beginning and ending indices are not mandatory. In this instance, we are providing only the starting index.
# Python String startswith() method
# Declaring variable
str = "Hello World"
# Calling function
str2 = str.startswith("Python",6)
# Displaying result
print (str2)
Output:
Python String startswith Method Example 4
It yields a true value when the string resides between the specified start and end indices, beginning with the given prefix. An illustration is provided to clarify the procedure.
# Python String startswith() method
# Declaring variable
str = "Hello World"
# Calling function
str2 = str.startswith("Python",6,10)
# Displaying result
print (str2)
str2 = str.startswith("Python",8,12)
# Displaying result
print (str2)
Output:
True
False
