rust/comprehensive-rust
1
0
Fork 0
mirror of https://github.com/google/comprehensive-rust.git synced 2025-05-28 13:17:35 +02:00
Code Issues Releases Activity

Corrected Luhn's Algorithm Step 3 (#1194)

Browse Source 
In the exercise guideline for the Luhn's algorithm (Day 1, Afternoon
exercise), I made a correction to step 3 to provide a more accurate
explanation. Instead of stating that doubling 7 becomes 14, I clarified
that doubling 7 results in 14, and we should sum the individual digits
of 14 to get the correct value of 5.
This commit is contained in:
Muhammad Mahmood 2023-09-11 15:24:05 +01:00 committed by GitHub
parent fb95f779d2
commit 354f3afa7c
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/exercises/day-1/luhn.md
View File

@ -9,8 +9,8 @@ following to validate the credit card number:
* Moving from **right to left**, double every second digit: for the number `1234`,
we double `3` and `1`. For the number `98765`, we double `6` and `8`.
* After doubling a digit, sum the digits. So doubling `7` becomes `14` which
becomes `5`.
* After doubling a digit, sum the digits if the result is greater than 9. So doubling `7` becomes `14` which
becomes `1 + 4 = 5`.
* Sum all the undoubled and doubled digits.