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#python #pythontutorial #pythonprogramming

Membership operators = used to test whether a value or variable is found in a sequence
(string, list, tuple, set, or dictionary)
1. in
2. not in

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EXAMPLE 1
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word = "APPLE"

letter = input("Guess a letter in the secret word: ")

if letter in word:
print(f"There is a {letter}")
else:
print(f"{letter} was not found")

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EXAMPLE 2
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students = {"Spongebob", "Patrick", "Sandy"}

student = input("Enter the name of a student: ")

if student in students:
print(f"{student} is in this class")
else:
print(f"{student} is NOT in this class")

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EXAMPLE 3
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grades = {
"Sandy": 'A',
"Squidward": 'B',
"Spongebob": 'C',
"Patrick": 'D'
}

student = input("Enter the name of a student: ")

if student in grades:
print(f"{student}'s grade is {grades[student]}.")
else:
print(f"{student} is not in the dictionary")

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EXAMPLE 4
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email = "[email protected]"

if "@" in email and "." in email:
print("Valid email")
else:
print("Invalid email")