Check value in array exists Flutter dart

Issue

I am trying to check condition

if (value in List) {
  exist
} else { 
  not exist
}

but nothing to help anyone having an idea then please share.

My List = _quantityController[];

itemId is integer

i want to check my item id exists in my list array or not...Thanks!

Solution

list.contains(x);

Contains method

Answered By - Zroq