Resistors: K, KR and MR vs OHM [SOLVED]

Using Arduino General Electronics
1

Hi all,

I this is probably a stupid question, but for some reason i'm having a hard time finding an answer. I was looking to by a starter kit on amazon for my uno r3, and i noticed that one of the kits had k, kr, and mr resistors:

8x Resistor - 220R
4x Resistor - 1 kR
4x Resistor - 10 kR
4x Resistor - 100 kR
1x Resistor - 1 MR
1x Resistor - 5.1 MR

and another had ohms:
8x Resistor - 220?
4x Resistor - 1 k?
4x Resistor - 10 k?
4x Resistor - 100 k?
1x Resistor - 1 M?
1x Resistor - 5.1 M?

Are they the same?
Are they completely different?
Or Is there a conversion?

Anything is appreciated.
Thanks!

2

Same

3

It's just that it's not as easy to access an omega sign on a computer so it's less fuss to type an R.

4

No, you either use M, k or R, not kR or MR, that entry is wrong (insofar as
an informal convention can be used wrongly!)
The R is a really just a decimal point in the shorthand notion like 2k2 1M5
5R6 (used because printed values on components are often poor quality
printing and a decimal point could easily be missed, so 2.2k and 22k could
be confused, whereas 22k and 2k2 are clear).

You can say k-ohm, M-ohm and ohm too if you want.