In python, why do we use x+=2 instead of using x=x+2

Question

I already understands how it works but wanted to know how it helps to use x+=2 instead of x=x+2. (Suppose i have already set the value of x to 4)

Answer 1

There is actually a difference between a = a+ b and a += b. If you are doing this on a mutable object (like a list) the first one creates a new object and the second one mutates the original one. Usually this doesn't matter but if you don't know about it, it can be a bug that's very hard to find.

Answer 2

x += 1 is supposed to change a value 'in-place' (although it not always happens), while x = x+1 creates a new object in a new memory location and gives it the name x that belonged to that other object/location before.

Answer 3

It's just shorter.
Maybe programmers are so lazy. 😂

It could also be useful in some cases when you dont want to use parentheses, because inplace operators' operation precedences are low.

Answer 4

Well it just makes it more readable. No real reason to waste more space (and its easier to understand with bigger codes)

In both cases the result will be 6👍🏼

Answer 5

If you were to use x=x+2 you would create a digital portal to an alternate dimension where everybody is wearing hotdog hats. Also, its about space.

Answer 6

Ian18, I would definitely like to take a closer look at that overload of __add__! 😜

Answer 7

there is no why, is a matter of prefference, if you like x=x+2 then you can use that

Answer 8

Thanks

Answer 9

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