# Quiz 23

What is the purpose of adding the message length to the message block?

**Type all answers and select the correct one**

* [x] To ensure the message block is a multiple of 512 bits
* [ ] To add randomness to the hash
* [ ] To increase the security of the hash
* [ ] To reduce the size of the message block<br>

**Note to Learners**

"The final step in our message block(s) construction is to add the length of our input message using the last 64 bits or 8 bytes of our message block space to get our message block to a multiple of 512 bits or 64 bytes."

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To learn more about it, you can follow the course [Walkthrough Implementation of SHA-256 in Golang](https://bsvblockchain.360learning.com/course/play/68bac07ee4056be2a5dd1108)


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