export function findTheLongestWord (sentence?: string): string{
  // You Can Code Below Here  
    if (sentence === undefined)
        throw new Error('gaboleh undefined')
    else if (sentence === null)
        throw new Error('gaboleh null')
    else if (typeof sentence !== 'string')
       throw new Error('harus string')
    else if (sentence.trim() === "")
        throw new Error('gaboleh kosong')

    const split = sentence.split(/\s+/);
    let terpanjang = "";
    let panjang = 0;
    let multi = false;

    for (const row of split) {
        if (row.length > panjang) {
            terpanjang = row;
            panjang = row.length;
            multi = false;
        } else if (row.length === panjang) {
            multi = true;
        }
    }

    if (multi) {
        return "no longest word found";
    } else {
        return `${terpanjang}: ${panjang} chars`;
    }
}

findTheLongestWord("I love Nagatech")
findTheLongestWord("Programmer use Typescript")
findTheLongestWord("Determine the Injustice")
findTheLongestWord("Nagatech Sistem Integrator")
findTheLongestWord("NGTC")
findTheLongestWord("Kamu ska Typescript")