I have two strings and I would like to check whether the first is a substring of the other. Does Python have such a built-in functionality?

2021-01-19

# How do I check if a given Python string is a substring of another one?

## The Question :

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*The Question Comments :*

- It is already answered here:stackoverflow.com/questions/2590503/…

## The Answer 1

*491 people think this answer is useful*

Try using `in`

like this:

>>> x = 'hello' >>> y = 'll' >>> y in x True

## The Answer 2

*53 people think this answer is useful*

Try

isSubstring = first in theOther

## The Answer 3

*38 people think this answer is useful*

`string.find("substring")`

will help you. This function returns `-1`

when there is no substring.