how can i just take 1 number after the . ? example 5.232332 i want to get 5.2

But it should be noted that glcummins last method only works if you are trying to shorten this specific number.  If the number has more digits before the decimal, it will cut them off.

So, I guess to summarize these methods:

Method 1:
5.232332 shortens to 5.2
Method 2:
5.232332 shortens to 5.2
Method 3:
5.232332 shortens to "5.2"

Method 1:
16.5812 shortens to 16.6
Method 2:
16.5812 shortens to 16.5
Method 3:
16.5812 shortens to "16."