Question

The len function consumes a list and returns its length as an integer. Use the len function to write your own function check_length that consumes a list and returns whether it is 3-5 items long. Call and print this function twice.

Answer 1

Answer:

def check_length(mylist):

       length = len(mylist)

       if 3<=length<=5:

               message = "The length of the list is "+str(length)+" items long"

       else:

               message = "The length of the list is not within range of 3 to 5"

       return message

 

mylist = []

print("Press Y to continue input")

cont = 'Y'

while cont == 'Y':

       b = input("Input: ")

       mylist.append(b)

       cont = input("More Input?Y: ")

 

print(check_length(mylist))

print(check_length(mylist))

Explanation:

The program creates an empty list and prompts user for input until user presses a key other than Y

This line declares function check_list

def check_length(mylist):

This line calculates the length of the list passed to the function

       length = len(mylist)

This line checks the length of the list if it is within the range of 3 to 5

       if 3<=length<=5:

This line gets the length of the list if it is between 3 and 5 (inclusive)

               message = "The length of the list is "+str(length)+" items long"

       else:

If otherwise, this line returns that the length is not within range

               message = "The length of the list is not within range of 3 to 5"

This line returns the appropriate message based on the conditional statement above

       return message

The main statement starts here

This line defines an empty list  

mylist = []

This line gives the user instruction on how to input

print("Press Y to continue input")

cont = 'Y'

While the user presses Y, the following while conditional statement is executed

while cont == 'Y':

       b = input("Input: ")

       mylist.append(b)

       cont = input("More Input?Y: ")

 

The next two line calls the function twice

print(check_length(mylist))

print(check_length(mylist))