are public keys case sensitive?

[BitcoinQTlol]

Are private keys case sensitive?

if i was writing down my priv key would i need to make it case sensitive

[cr1776]

This will probably answer the questions, but in general, yes:
https://en.bitcoin.it/wiki/Bitcoin_address
https://en.bitcoin.it/wiki/Base58Check_encoding

:-)

(Obviously since they are numbers you can print a key in binary, decimal, hex or other format and it would not be case sensitive, so it depends a lot on the encoding and how it is displayed, but for the default format the above covers it.)

[grau]

Are private keys case sensitive?

if i was writing down my priv key would i need to make it case sensitive

The private key is a large number. It is up to you how you encode it. The usual WIF or BIP32 encodings are case sensitive.

[ns12123]

It's case sensitive but if you mistyped you will not be able to send it. They will come back

[tkbx]

Base58 private keys (example: 5Kb8kLf9zgWQnogidDA76MzPL6TsZZY36hWXMssSzNydYXYB9KF) are case sensitive, since the different cases represent different bytes (A is 01000001, a is 01100001).

Hexadecimal private keys (example: 9873D79C6D87DC0FB6A5778633389F4453213303DA61F20BD67FC233AA33262) are not case sensitive (9873D79C... and 9873d79c... are the same exact key, since the letters are actually numbers 10 - 15)