Membership Operators

Membership operators are used to check if a value exists inside a sequence (like a sentence of text or a list of items).

Think of it as searching for something inside a container.

Python has two membership keywords: in and not in.

---

1. The in Operator

Returns True if the value is found inside the container.

Searching inside text (Strings):

sentence = "Python is the future of AI"

# Check if the word "AI" is inside the sentence
print("AI" in sentence)      # Output: True
print("Java" in sentence)    # Output: False

Searching inside lists:

# A list of names (we will learn more about lists later!)
names = ["Rahul", "Sai", "Priya"]

print("Sai" in names)    # Output: True
print("John" in names)   # Output: False

---

2. The not in Operator

Returns True if the value is not found inside the container (returns the opposite of in).

sentence = "Python is the future of AI"

print("Java" not in sentence)  # Output: True (Java is indeed not there!)
print("AI" not in sentence)    # Output: False (Because AI is there!)