Please can someone advise about the following problem.

I have a spreadsheet with 2 columns each with parallel data to which other
cells need to refer eg

1 1.5
2 2.7
3 2.9
4 3.1
5 3.5
6 3.8
7 4.1
8 5.2
9 6.3
10 7.3

I also have a data entry cell where I can enter numbers from 1 to 10, and a
result cell which needs a formula which automatically returns the data from
column on the right to match that on the left. To put it simply, if I enter
a 2 into the data cell I want to see 2.7 in the result cell; if I enter 7, I
want to see a result of 4.1

I've managed to do this with a complicated set of nested IF calculations,
but these run out at 7 nests, so I can't do this for all 10 sets of data.

Is there a way of doing this?

Thanks

Clive