Checking Membership in Python

In Python, we can check whether a string or character is a member of another string or not using "in" or "not in" operators.

These two membership operators are described in the table below:

Symbol Operator Name Description
in in The result of this operation becomes True if it finds a value in a specified sequence and False otherwise.
not in not in The result of this operation becomes True if it doesn't find a value in a specified sequence and False otherwise.

While comparing the string, these operators consider uppercase and lowercase letters or strings separately and make case sensitive comparisons.

A Python Program to Know Whether a String Exists in the Main String or Not

Example:

str1 = input('Please enter first string: ')
str2 = input('Please enter second string: ')
if str2 in str1:
    print(str2+' found in the first string.')
else:
    print(str2+' not found in the first string.')

Output:

Please enter first string: We are writing core python
Please enter second string: python
python found in the first string.

The above program takes two inputs from the keyboard and checks whether the second string found in the first string or not.

Found This Page Useful? Share It!
Get the Latest Tutorials and Updates
Join us on Telegram
Keep W3schools Growing with Your Support!
❤️ Support W3schools