Big O

 const nemo = ["nemo"];
 const large = new Array(1000).fill("nemo");
 
 function findNemo(array){
     for(i=0;i<array.length;i++){
         if(array[i]==="nemo"){
            console.log("Nemo Found")
         }
     }
 }
 
 findNemo(large);
 
//  This is linear function hence its a O(n)