#!/usr/bin/env python
# coding: utf-8

# ## Warm Up - counting 9s
# 
# Write a python function to do the following
# 
# Given an array of ints, return the number of 9's in the array.
# ```
# array_count9([1, 2, 9]) → 1
# array_count9([1, 9, 9]) → 2
# array_count9([1, 9, 9, 3, 9]) → 3
# ```

# In[16]:


# Your code here