if else-works,if else with ternary operator doesn't work

I have simple if/else statement,and it works normally,but doesn't work when I replace it with if/else statement using ternary operator.

  if (UPorDOWN == -1 ) {
    SEC_IN_VIEW++
  } else{
    SEC_IN_VIEW--
  }

That works,but how can I make that work using if/else statement with ternary operator. I tried this.

   (UPorDOWN == -1 ) ? SEC_IN_VIEW++ : SEC_IN_VIEW--