Getting error in list assignment about index?

Question

I recently started to study Python, and as I was trying to run a code from a book (with my modification) I got the error:

IndexError: list assignment index out of range
in : `Names[len(Names)]=name`

I read some questions with this error on web but can't figure it out.

Names=[]
num=0
name=''
while True :

    print('Enter the name of person '+str(len(Names)+1) + '(or Enter nothing to stop)')
    name=input()

    if name == '' :
        break

    Names[len(Names)]=name
print('the person names are:')

for num in range(len(Names)+1) :
    print('   '+Names[num])

Answer 1

You can not access out of range index Ex:

>>> l = [1,2,3]
>>> l = [0,1,2]
>>> l[3] = "New"

Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    l[3] = "New"
IndexError: list assignment index out of range

For that, you have to append new data to the list.

>>> l.append("new")
>>> l
[0, 1, 2, 'new']

You can try:

Names=[]
num=0
name=''
while True :

    print('Enter the name of person '+str(len(Names)+1) + '(or Enter nothing to stop)')
    name=input()

    if name == '' :
        break

    Names.append(name)
print('the person names are:')

for num in range(len(Names)) :
    print('   '+Names[num])