The resulting confusion is why I would recommend sticking to the conventional representation as used by all the other responders.
Just to expand.
The letter (usually in terms of the multiplier prefix, kilo, mega etc) is placed instead of the decimal point
So
1.8 megohms becomes 1M8
1.8 kilo ohms becomes 1k8
and the symbol R is used for no prefix
So
1.8 ohms becomes 1R8
This method is clear, simple and unambiguous.
It is also much harder to loose the decimal point.
Note that the international symbol for the ohm (or other unit), omega, should never appear in the middle of a value - that is just plain wrong.
It should always be appended at the end
eg 1.8Ω, 1k8Ω, 1M8Ω, 1.8 kΩ, 1.8MΩ and so on.
Of course, the word or symbol ohms is generally redundant, you should consider whether you should be doing electronics if you don't know resistors are measures in ohms.