What's difference between $i++ and ++$i

Question

If any code $i=4 $j=$i++ and $j=++$i.what is the value of $j on both questions.I don't understand this

Answer 1

$i++ is known as post-increment. It increments the value of $i only after assigning the original value of $i to $j first.

++$i is known as pre-increment. It increments the value of $i before assigning the value to $j, so the updated value of $i will be assigned to $j.

Hence,

$i = 4;
$j = $i++;
// Now, $i = 5 and $j = 4

$i = 4;
$j = ++$i;
// Now, $i = 5 and $j = 5

These theories apply in a similar manner for decrementing as well.

Hope this helps!

Answer 2

Thanks

Answer 3

Yes, corrected.. thanks for pointing out!

Answer 4

Shouldn’t the last one be pre instead of post again