calculus - Find the limit of exponent/factorial sequence

I don't know how to even stoke it...

$$\lim_{n\to \infty } \frac{2^n}{n!} =$$

Answer

HINT

Prove that

$$0 < \dfrac{2^n}{n!} \leq \dfrac4n$$ for all $n \in \mathbb{Z}^+$ using induction and then use squeeze theorem.