Compare a variable with every member of an array?

Question

So if I want to compare a varibale with an array

if(var = arr[0] || var = arr[1] || var = arr[2] ...)

is there a possibility to do it easier, faster, with less writing?

something like

if(var = arr[all])

or
for(int i = 0; i < arr.length; i++)
if(var == arr[i])
//do stuff

?

Answer 1

for (var i=0; i< arr.length; i++) {
if (var == arr[i]) {
// Code here
}
}

Answer 2

I figured it out by now

seems like the one in my example ..
maybe I shouldn't hesitate and ask everything before experementing

thank you for your contribution