CODEWITHSUNDEEP
pythonsyntaxmodulofloor-division
user3351676
user3351676

Reputation: 91

What do operations n % 2 == 1 and n //= 2 do in Python?

Can someone explain the semantics of

n % 2 == 1

and

n //= 2

As I understood n % 2 == 1 checks if the remainder of the division of n by 2 is 1.

What about n //= 2? Is this a floor division? But of what? n divided by 2?

Upvotes: 2

Views: 24266

Answers (1)

Red
Red

Reputation: 27577

n % 2 == 1 means to return True if the remainder of n / 2 equals to one, the same as checking if n is an odd number.

So if n equals to 6, the above expression will return False. If n equals to 9, it will return True.

n //= 2 means to redefine the n variable, but assigning the original value with the floor division of 2 calculated into it.

So if n equals to 6, the above expression will change its value to 3. If n equals to 9, it will change its value to 4.

Upvotes: 5

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