Java: Prefix/postfix of increment/decrement operators?

Question

From the program below or here, why does the last call to System.out.println(i) print the value 7?

class PrePostDemo {
     public          


        

Answer 1

Think of ++i and i++ as SIMILAR to i = i+1. But it is NOT THE SAME. Difference is when i gets the new increment.

in ++i , increment happens immediately.

but if i++ is there increment will happen when program goes to next line.

Look at code here.

int i = 0;
while(i < 10){
   System.out.println(i);
   i = increment(i);
}

private int increment(i){
   return i++;
}

This will result non ending loop. because i will be returned with original value and after the semicolon i will get incremented but returned value has not been. Therefore i will never actually returned as an incremented value.