What does 'Xpp' mean?

[jelly]

Hello everyone

# ld([Y,Xpp], OUT) ld [y,x++],out

What does 'x++' mean?
If there's a code like that, what is happening?

As I think,

1. RAM [YYYYYYYYXXXXXXXX] is loaded to the OUT register
2. X register incremented

is it right?

For example, if each register value and the codes are like that;

X: 0000 0010
Y: 0000 1000
RAM 0x0208: 0000 1111
RAM 0x0209: 1111 0000

ld([Y,Xpp], OUT)
ld([Y,Xpp], 'Temp')

1. OUT register value changed: 0000 1111
2. X register incremented: X: 0000 0011
3. 'Temp' register value changed: 1111 0000
4. X register incremented: X: 0000 0100

Is it right?

I'm a student and English is not my mother tongue and I'm not good at writing English
Please help me!!!

[at67]

That's correct Xpp is a post increment of X, the increment happens after the operation

[Sugarplum]

Ah yes, Xpp is also X++. The pp part is "plus plus," so post-increment X.