Create a function that takes a list of numbers and return "Boom!" if the digit 7 appears in the list. Otherwise, return "there is no 7 in the list".
seven_boom([1, 2, 3, 4, 5, 6, 7]) ➞ "Boom!"
# 7 contains the number seven.
seven_boom([8, 6, 33, 100]) ➞ "there is no 7 in the list"
# None of the items contain 7 within them.
seven_boom([2, 55, 60, 97, 86]) ➞ "Boom!"
# 97 contains the number seven.
N/A