const shape = {
  radius: 9,
  d() {
    return this.radius * 2;
  },
  p: () => 2 * Math.PI * this.radius,
};

console.log(shape.d());
console.log(shape.p());

const str = 'abc';
if (str[0] >= 'a' && str[0] <= 'z') {
  let a = parseInt(str[0]);
  a -= 32;
  console.log(a);
}