You have a list of numbers and a single number. You need to check if the single number is in the list. If it is, you say 'Yes', and if it isn't, you say 'No'.
Input: [3, 1, 4, 1, 5], 4
[3, 1, 4, 1, 5], 4
Output: Yes
Yes
Input: [100, 100, 100, 100], 100
[100, 100, 100, 100], 100