wath is Increment ++ and Decrement --

Question

hello can someone help me i don`t understand the Increment ++ and Decrement --
and i don't now what to do

Answer 1

At first, you could consider search in the searchbar
but, since you already asked, here the answer(its for all languages the same)
x = y++
means
x = y;
y+=1;

x = ++y
means
y+=1;
x = y

same for --
x = y--
means
x = y;
y -= 1;

x = --y;
means
y -= 1;
x = y;