In blackjack what does the ace's value

Question

what does the ace stand for in blackjack

Answer 1

if you have a jack its 11 any other card with an ace its 1

Answer 2

Ace is 1

However, when Ace accompany by 10, J, Q or K, then it act as 11

Answer 3

1 or 11... your choice.

Unless your other cards would make you bust if the Ace is valued at 11, then its 1

Answer 4

1 or 11