create a function of a set of integers and a value for which you need to find the nearest one.

def find_closest(num, arr):
    
    distance = 9999999999999
    closest = 0
    
    for n in arr:
        if abs(num - n) < distance:
            distance = abs(num - n)
            closest = n
    
    return closest
    
find_closest(7, [1, 7, 9])