Difference between prefix and postfix

Question

I still does not understand about prefix and postfix statements.. what is the difference ??

Answer 1

Take this example:

x = 2;
y = ++x;

// y is 3, x is 3

Whereas something like this is:

x = 2;
y = x++;

// y is 2, x is 3. It does y = x and then
// increments it.

Answer 2

x=2
y=++x
means you add first 1 to x then you assign the value x to y. thats why the answer is y=3

x=2
y=x++
means you assign the value of x to y first then you add 1 to x. so the answer will be y=2

Answer 3

++x is prefix increment. it will add 1 to the variable 'x' in place.
x+=1

is the same as:

++x

x++ is postfix increment. it will first return the variable and only then add 1 to it.

temp=x
x+=1
return temp

is the same as:

x++