if statement: if not equal to certain numbers [duplicate]

This question already has an answer here:

• Is there a simpler way to check multiple values against one value in an if-statement? 11 answers

i want to say in my if statement: if selbin is not equal to 1 or 2 then throw exception

if (selbin != 1 , != 2){
  }

this is what i've got thanks in advnce