Making a function that can check if a specific digit in a number string is present

Question

I want to create a function that can see if an input contains an int in some way.

For example, if the input was 17, 7, 70, 87 etc. It could check if a seven is present. Like the number 17 contains a 7.

Code:

UserInput = int(input("Input a number and check if it contains 7"))
if (insert statement to check for 7):
    print("there is a seven in your number")

Thank you in advance.

I have not really encountered any obstacles, since I don't know where to begin. Thank you for your help — Otto, Sep 02 '20 at 21:53
Does this answer your question? [Get a list of numbers as input from the user](https://stackoverflow.com/questions/4663306/get-a-list-of-numbers-as-input-from-the-user) — Elijah, Sep 02 '20 at 22:00

bsukalo · Accepted Answer · 2020-09-03T12:07:29.400

Since OP asked for a function, it would look something like this:

def checkNum(num):
    if "7" in str(num):
        return True
    else:
        return False

The (num) variable is the information that is passed into the function. In this case, it's your given number. The if statement does pretty much what it says it does. It checks if "7" is in the data that you inputted. If it is, it returns the value of True. If that isn't true, it returns False.

Finally you'll need a statement to print the result of the function and to input your data like this:

print(checkNum(*your number here*))

You can use input instead of a number to type in the number if you'd like.

Thank you! That is exactly what I was looking for – Otto Sep 02 '20 at 22:14 — Otto, Sep 02 '20 at 22:14

score 1 · Answer 2 · answered Sep 02 '20 at 22:14

1

Here's a funny way of doing it

if len(input("Input a number and check if it contains 7").split('7'))>1:
print("there is a seven in your number")

answered Sep 02 '20 at 22:14

Seyi Daniel

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Well this also works fine! Thank you. – Otto Sep 02 '20 at 22:17

Making a function that can check if a specific digit in a number string is present

2 Answers2