Contains in Python

In Python, the in keyword is used to check whether a value is present in a sequence, such as a string, list, tuple, or set.

The syntax for using the in keyword is as follows:

value in sequence

Here, value is the item you want to check for, and sequence is the sequence you want to check in. The result of the in operator is a boolean value (True or False) depending on whether the value is present in the sequence.

For example, let’s say we have a list of fruits:

fruits = ["apple", "banana", "orange", "kiwi"]

To check if “banana” is present in the list, we can use the in keyword:

if "banana" in fruits:
    print("Yes, banana is in the list!")
    print("No, banana is not in the list.")

This will output:

Yes, banana is in the list!

Similarly, we can use the in keyword to check if a substring is present in a string, like this:

text = "The quick brown fox jumps over the lazy dog"

if "fox" in text:
    print("Yes, 'fox' is in the text.")
    print("No, 'fox' is not in the text.")

This will output:

Yes, 'fox' is in the text.