in keyword
Strings are pretty powerful and python has a diverse set of utilities to work with them. Some applications require checking if a string appears in another string. When searching a word on a website (Ctrl + F), we want to check if the word we typed appears in the text of the website.
In python, checking if a string appears in another string can be done with the
in keyword:word = 'access'
text = 'The entire house was accessible through that underground tunnel'
if word in text:
print('Yes, the word is in the text')
else:
print('Not found...')It’s not mandatory for the first string to be only a word. It can be an arbitrary string. We can check for
if 'some string with symb$ls' in text:.Challenge
You are developing a chatbot. You would like to identify if a message was a greeting message. To do that you want to know if the message contains
Hi, hi, Hello, or hello in it. Given a text, your task is to print
Yes if the text is a greeting message and No otherwise.Input | Output |
Hi, I would like to invite you to a conference | Yes |
My name is Bob | No |
Constraints
Time limit: 2 seconds
Memory limit: 512 MB
Output limit: 1 MB