Question

I have completed the problema set 0 but i consider it week. because it crashes when i insert a leter in the dathe of birth while i want it simply to restart the question if a leter is insert in the date "spot".

Answer 1

sorry not week but weak

Answer 2

my program is:

print ("enter your dathe of birth by the folowing order")
day = 0
while day < 1 or 31< day
day = int(raw_input("day= "))
month = 0
while month < 1 or 12 < month
month = int(raw_input("month= "))
year = 0
while year < 1900 or 2015 < year
year = int(raw_input("year= "))
lastname = raw_input("enter your last name")
print ("last name= " + lastname + " dathe of birth= " + date + "-" + month + "-" + year

Answer 3

if a leter is insert in the dathe of birth then the program crashes and i whant it to simply ask agend

Answer 4

Then you need to learn about how to do inpiut validation. That is not always a simple task.

Answer 5

Here, this goes over it:
http://cis1.towson.edu/~cssecinj/modules/cs1/input-validation-cs1-python/

Answer 6

The int() function gets testy when given a character. raw_input() returns strings. You can check to see if the string is digits with the isdigit() method:

dayString = raw_input("day= ")
if( dayString.isdigit() ):
day = int( dayString )