TemplateFormat

function format(input) {
    let str = '<?xml version="1.0" encoding="UTF-8"?>\n<quiz>\n';
    let questions = '';
    let answers='';

    for(let i = 0; i <= input.length - 1; i+=2) {
        let question = input[i];
        let answer = input[i+1];
        str += ` <question>\n${question}\n</question>\n`;
        str += ` <answer>\n${answer}\n</answer>\n`;
    }

    str += '</quiz>';
    console.log(str);
}