expression help

[#1]

I am looking at one of the example somewhere was trying to figure out the below expression

=if(0 = $(variable), ' - ', $(variable))

What does this mean?

[Clever_Anjos]

It variable contains 0 value, it should return "-", otherwise, variable value

[JonnyPoole]

Its showing the value that the variable equals, with one minor exception in that if its 0 then show as '-'

A-> A

B-> B

C-> C

0->  -