Old Books

function oldBooks(input) {

    let book = input[0];
    let index = 1;

    let isFound = false;
    let nextBook = input[index];
    while (nextBook !== 'No More Books') {

        if (nextBook === book) {
            isFound = true;
            break;
        }

        index++;
        nextBook = input[index];

    }

    if (isFound === false) {
        console.log(`The book you search is not here!`);
        console.log(`You checked ${index - 1} books.`);
    } else {
        console.log(`You checked ${index - 1} books and found it.`);
    }

}

oldBooks(["Troy", "Stronger", "Life Style", "Troy"])