Linear search using for

sequence=[2,1,3,4,5,3,5,6]

n = int(input("Which number are you looking for? "))
position = 0

def search(sequence,n):

    for position in range(len(sequence)):
        if n == sequence[position]:
            print(sequence[position], "is at position", str(position))
            position +=1
    return n

search(sequence,n)