Question

I try to define a PYTHON program that can print the largest factor of the number except for the number itself. Ex: enter n as 15, the program will print: 5. The factor of 15 is 15, 5, 3, 1, but 15 will not be counted in this case. If enter a prime number, it will print 1.

I am not sure what I did wrong here, please point out my mistake and advise how should I improve.

def largest_factor(n) the_number = n list1 = while n 0: start=n if the_number%start== 0: return start list1.append(start) # get all the value into a list n n-1 if the_number%start!= 0: return 1 list2= list1.remove(n) #remove the number itself from the list return max (list2) # print the max value print (largest_factor(7))

Answer 1

CODE

def largest_factor(n):
the_number = n
list1 = []
while n>0:
start=n
if the_number % start == 0:
list1.append(start) # get all the value into a list
n=n-1
list2 = list1[1:] # remove the number itself from the list
return max(list2) # print th e max value

EXPLANATION

You do not need to return in If statements and another If when the_number % start != 0 is not needed simply use slice and remove the first element from list which is the number itself which you want to find the largest factor.

Case 1: When you want to find largest factor of 7.

list1 = [7,1]

when use slice i.e list2 = lst1[1:] 7 will be removed and list2 = [1] and max of list2 is 1. So, 1 is the largest factor of 7.

Case 2: When you want to find largest factor of 15.

list1 = [15,5,3,1]

when use slice i.e list2 = lst1[1:] 15 will be removed and list2 = [5,3,1] and max of list2 is 5. So, 5 is the largest factor of 5.

CODE AND OUTPUT

def largest factor(n): the number = n listi =[] while n 0 start=n if the number start == 0: list1.append ( sta rt ) # get all the value into a list n=n-1 list2 = list1[1:1 # remo ve the number itself from the list return max (list2) # print the max value print (largest factor (15)) 5

def largest_factor(n): the number = n listl = [] while n>0: start=n if the number % start == 0: listl.append ( start) # get all the value into a list n n-1 list2 = list1[1:1 # remo ve the number itself from the list return max(list2) # print th e max value print (largest factor(7) ) 1

def largest factor(n): the number = n listl = [] while n>0 start=n if the number start == 0: list1.append ( sta rt ) # get all the value into a list n n-1 list2 = list1[1:] # remove the number itself from the list return max (list2) # print th e max value print (largest_factor(100) ) 50

def largest factor(n) the number = n list1 = [] while n>0: start-n if the number % start == 0: listl.append ( start) # get all the value into a list n n-1 list2 = list1[1:] # remove the number itself from the list return max(list2) # print th e max value print (largest_factor (79) ) 1

I have tried to answer the question as briefly and simply as possible if you find any problem in the solution provided ask in comment,