Linear search (to find index of number in sorted array) - Javascript

var numbers = [1,2,3,4,5,6,7];
var found = 0;
var numberToSearch = 5;
for(var i=0; i<numbers.length; i++) {
if(numberToSearch == numbers[i]) {
console.log('index is ' + i)
found = 1;
}
}
if(found == 0) {
console.log("Not found")
}