[Tutor] (no subject)

[Akash Mudgil]

Let's say if you wanted to search for a username in a, list where
'username' variable is predefined.

Example:


username='BOB'

usernames=['BOB','Alice','David']

for i in range(len(usernames)):
if usernames[i]==username:
print("User exists in the list")

This program doea a linear search on every index in the list, and if the
value matches, returns the output. The len function gets the total length
of the list, and the range function defines the scope of the search from
beginning to end of the list.

Hope this helps.

On Tue, 11 Feb, 2020, 1:27 AM Mats Wichmann, <mats at wichmann.us> wrote:

> On 2/10/20 12:36 PM, Alfie Lee wrote:
> >
> >
> > Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
> >
> > If say I had a variable called ‘username’, and a list of usernames
> called ‘usernames’; how would I write it so that the programme will check
> if that username is in the usernames list?
> > this would be using an if statement if possible.
> >
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>
> if username in usernames:
>
>
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