i don't understand

Question

x += y--
how does it work ??

Answer 1

plus equal can you also write like that:
x = x + y--

the double minus after the y means y minus one after the assignment, so it doesn't affect y in the assignment of x here. It just affect y after the assignment.

For example when x = 5 and y = 3
x = 5 + 3 = 8

but after 8 is assigned to x, y is decremented by one, so:
y = 2

to understand the double minus
(which is called decrement) you can read here:
https://www.baeldung.com/java-unary-operators

Answer 2

x += y-- means
x =x+ y

y ofter Double -- are post increment means
For example x=2,y=5

x = 2 + 5 = 7

-- it will decrement the y value ofter assignment

Means y value become 6

see this sections in assignments , increment and decrement operators
https://www.sololearn.com/learn/C/2917/

Answer 3

yes at last y decrement

Answer 4

🎸🎸🎸 oops sorry. Thanks for correcting

Answer 5

Ah yes, forgot to mention y in that example, now I added it

Answer 6

x is incremented by y and then y is decremented by 1

Answer 7

thanks for responding ❤️