linear searching

let arr = [1,2,3,4,5,6,7]
let n = arr.length
let c = 5;

function linearsearch(arr,n,x){
for(let i = 0 ; i<=n ; i++){
if(arr[i]==x){
return x;
}

}return -1;

}

let result = linearsearch(arr,n,c)
if(result>0){
console.log(this is the element arr[${result}])
}
else
{
console.log("element not exist")
}