When we change the prefix increment(++i) to the postfix increment(i++) it outputs 60 instead of 12. Why ?

Question

https://code.sololearn.com/cXkauFN9t8T1/?ref=app

Prefix:-
int f=1,i=2;
while(++i<5){
f*=i;
}
cout<<f<<"\n";
Output = 12

Postfix:-
int f=1,i=2;
while(i++<5){
f*=i;
}
cout<<f<<"\n";
Output = 60

Why ?

Answer 1

Step 1:-
while(2++<5){ //postfix,2 is less than 5
f=1*3 //2++ =2+1 =3
}
Step 2:-
while(3++<5){ //true
f=3*4
}
Step 3:-
while(4++<5){ //true
f=12*5
}
So, f = 60

Answer 2

But how 60 ?

Answer 3

Da2 Thanks

Answer 4

Postfix computes before evaluation, prefix after evaluating

Answer 5

The loop gets one extra cycle 12*5 is 60