Very simple Concatenate question I just can't figure out

[ryland-dxdl]

I have two numerical values, A and B, that I am using to create a range field. Here is my current formula:

CONCATENATE({A}, "-", {B}). So far so good.

The tricky part is that not all of the entries have a B value, in which cases the result will look like {A}-. Ideally I would like it to just return the single value from A without the hyphen in this scenario.

I have tried using an IF to say IF(BLANK({B})) but here is where I get lost. 

Any advice is appreciated! I am very new to formulas... 

[TheTimeSavingCo · Accepted solution]

Does this look right? 

A & 
IF(
  B,
  " - " & B
)

[ryland-dxdl]

An elegant solution that works perfectly, thank you so much!