do-i-get-a-bonus.js

function bonusTime(salary, bonus) {
  if (bonus) {
    return '£' + (salary * 10);
  }
  return '£' + salary;
}

function bonusTime(salary, bonus) {
  if (bonus) {
    return `£${salary * 10}`;
  }
  return `£${salary}`;
}

function bonusTime(salary, bonus) {
  return bonus ? `£${salary * 10}` : `£${salary}`;
}

function bonusTime(salary, bonus) {
  return `£${bonus ? salary * 10 : salary}`;
}

function bonusTime(salary, bonus) {
  return `£${salary * (bonus ? 10 : 1)}`;
}

function bonusTime(salary, bonus) {
  const power = +bonus;
  return `£${salary * 10 ** power}`;
}

function bonusTime(salary, bonus) {
  return `£${salary}${bonus ? '0' : ''}`;
}

function bonusTime(salary, bonus) {
  if (bonus) {
    salary *= 10;
  }
  return '£' + salary;
}

console.log(bonusTime(10000, true), '£100000');
console.log(bonusTime(25000, true), '£250000');
console.log(bonusTime(10000, false), '£10000');
console.log(bonusTime(60000, false), '£60000');
console.log(bonusTime(2, true), '£20');
console.log(bonusTime(78, false), '£78');
console.log(bonusTime(67890, true), '£678900');