Aug-08-2022, 05:04 AM
When you use string_object.index(substring), it looks for the occurrence of substring in the string_object. If substring is present, the method returns the index at which the substring is present, otherwise, it throws ValueError: substring not found.
Using Python’s “in” operator
The simplest and fastest way to check whether a string contains a substring or not in Python is the “in” operator . This operator returns true if the string contains the characters, otherwise, it returns false .
Python “in” operator takes two arguments, one on the left and one on the right, and returns True if the left argument string is contained within the right argument string. It is important to note that the “in” operator is case sensitive i.e, it will treat the Uppercase characters and Lowercase characters differently.
Using Python’s “in” operator
The simplest and fastest way to check whether a string contains a substring or not in Python is the “in” operator . This operator returns true if the string contains the characters, otherwise, it returns false .
Quote:str="Hello, World!"
print("World" in str)//output is True
Python “in” operator takes two arguments, one on the left and one on the right, and returns True if the left argument string is contained within the right argument string. It is important to note that the “in” operator is case sensitive i.e, it will treat the Uppercase characters and Lowercase characters differently.