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Datatyper i Python

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Comparisons let your program ask yes/no questions about values:

  • Are these equal?
  • Is one bigger?
  • Is a value inside a range?

A comparison returns a Boolean (True / False) and powers if/while.

Equality ==

Checks whether two values are the same.


              
1234567

            
saved_pin = 1234
entered_pin = 1234
print(saved_pin == entered_pin)  # True

stored_email = "support@codefinity.com"
input_email = "Support@codefinity.com"
print(stored_email == input_email)  # False
copy
Note
Note

= - assigns, == - compares.

Inequality !=

True when values differ.


              
1234567

            
user_id_1 = 105
user_id_2 = 203
print(user_id_1 != user_id_2)  # True

username_1 = "alex"
username_2 = "alex"
print(username_1 != username_2)  # False
copy

Greater Than >


              
1234567

            
estimated = 7
actual = 9
print(estimated > actual)  # False

rating_a = 12
rating_b = 3
print(rating_a > rating_b)  # True
copy

Less Than <


              
12345

            
user_age = 17
min_age = 18
print(user_age < min_age)  # True

print("Alice" < "Bob")  # True
copy

Greater or Equal >=


              
123

            
student_score = 7
passing = 7
print(student_score >= passing)  # True
copy

Less or Equal <=


              
123

            
order_total = 10
limit = 9
print(order_total <= limit)  # False
copy

Chained Comparisons

Python supports natural ranges: 0 < x < 10 works like (0 < x) and (x < 10).


              
12345

            
temperature = 7
print(0 < temperature < 10)  # True

user_rating = 7
print(5 <= user_rating <= 7)  # True
copy

Comparing Strings

String comparisons are case-sensitive and lexicographic.


              
12345

            
saved_password = "Apple"
typed_password = "apple"
print(saved_password == typed_password)  # False

print("apple" < "banana")  # True
copy

For case-insensitive matching:


              
123

            
email_stored = "Support@Codefinity.com"
email_input = "support@codefinity.COM"
print(email_stored.lower() == email_input.lower())  # True
copy
question mark

Which single expression correctly checks that x is between 1 and 5 inclusive (using chaining)?

Select the correct answer

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Sektion 2. Kapitel 2

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Comparisons let your program ask yes/no questions about values:

  • Are these equal?
  • Is one bigger?
  • Is a value inside a range?

A comparison returns a Boolean (True / False) and powers if/while.

Equality ==

Checks whether two values are the same.


              
1234567

            
saved_pin = 1234
entered_pin = 1234
print(saved_pin == entered_pin)  # True

stored_email = "support@codefinity.com"
input_email = "Support@codefinity.com"
print(stored_email == input_email)  # False
copy
Note
Note

= - assigns, == - compares.

Inequality !=

True when values differ.


              
1234567

            
user_id_1 = 105
user_id_2 = 203
print(user_id_1 != user_id_2)  # True

username_1 = "alex"
username_2 = "alex"
print(username_1 != username_2)  # False
copy

Greater Than >


              
1234567

            
estimated = 7
actual = 9
print(estimated > actual)  # False

rating_a = 12
rating_b = 3
print(rating_a > rating_b)  # True
copy

Less Than <


              
12345

            
user_age = 17
min_age = 18
print(user_age < min_age)  # True

print("Alice" < "Bob")  # True
copy

Greater or Equal >=


              
123

            
student_score = 7
passing = 7
print(student_score >= passing)  # True
copy

Less or Equal <=


              
123

            
order_total = 10
limit = 9
print(order_total <= limit)  # False
copy

Chained Comparisons

Python supports natural ranges: 0 < x < 10 works like (0 < x) and (x < 10).


              
12345

            
temperature = 7
print(0 < temperature < 10)  # True

user_rating = 7
print(5 <= user_rating <= 7)  # True
copy

Comparing Strings

String comparisons are case-sensitive and lexicographic.


              
12345

            
saved_password = "Apple"
typed_password = "apple"
print(saved_password == typed_password)  # False

print("apple" < "banana")  # True
copy

For case-insensitive matching:


              
123

            
email_stored = "Support@Codefinity.com"
email_input = "support@codefinity.COM"
print(email_stored.lower() == email_input.lower())  # True
copy
question mark

Which single expression correctly checks that x is between 1 and 5 inclusive (using chaining)?

Select the correct answer

Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 2. Kapitel 2
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