# Quiz 42

What is the purpose of the 'How Much Padding' function in the RIPEMD-160 implementation?

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

* [x] To calculate the amount of padding needed to make the message block 448 bits congruent to 512 bits.
* [ ] To add the message length to the block.
* [ ] To compute the hash value.
* [ ] To initialize working variables.

**Note to Learners**

The logic is as follows: \[...] if messageLength%64 < 56, result = 56 - messageLength%64 \[...] This calculates the amount of padding needed.

&#x20;

To learn more about it, you can follow the course [Walkthrough Implementation of RIPEMD-160 in Golang](https://bsvblockchain.360learning.com/course/play/68beaa72463d6d5e89903937)


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