def linear(list11, no):
    for i in range (len(list11)):
        if no == list11[i]:
            print("Number found at index:", i)
            break

    else:
            print("Number not found!")

list11=(11, 22, 33, 44, 55, 11, 66, 77, 88, 99,)
print(list11)
no = int(input("Enter your Number.:\n"))
linear(list11, no)
