Why does the first one output 1?

Question

for loop 0<10, i 1=1, echo $num[1], isn’t the result 2?

Answer 1

The for loop first determines when $i=0, $int<10, then executes the statement in the for loop, which is echo $num[0], and then executes i++, and then determines when i=1, the poster will for The sequence of the cycle process is wrong

Answer 2

Start from the 0th one, 0=1