10. Diamond

function diamond(number) {
    let num = parseInt(number);
    for (let i = 0; i < num / 2; i++) {
        if (i === 0) {
            console.log(`${'-'.repeat(((num - 1) / 2) - i)}${num % 2 === 0 ? '**' : '*'}${'-'.repeat((num - 1) / 2 - i)}`);
        } else {
            console.log(`${'-'.repeat(((num - 1) / 2) - i)}*${'-'.repeat(i * 2 - num % 2)}*${'-'.repeat((num - 1) / 2 - i)}`);
        }
    }

    for (let i = (num - 2 + (num % 2)) / 2 - 1; i >= 0; i--) {

        if (i === 0) {
            console.log(`${'-'.repeat(((num - 1) / 2) - i)}${num % 2 === 0 ? '**' : '*'}${'-'.repeat((num - 1) / 2 - i)}`);
        } else {
            console.log(`${'-'.repeat(((num - 1) / 2) - i)}*${'-'.repeat(i * 2 - num % 2)}*${'-'.repeat((num - 1) / 2 - i)}`);
        }
    }
}