✏정수 음수 실수

let integer = 123; //정수
let negative = -123; //음수
let double = 1.23; //실수

console.log(integer); // 123
console.log(negative); //-123
console.log(double); // 1.23

✏2진수 8진수 16진수

let binary = 0b1111011; //2진수
let octal = 0o173; //8진수
let hex = 0x7b; //16진수

console.log(binary); //123
console.log(octal); //123
console.log(hex); //123

✏

console.log(0 / 123); // 0
console.log(123 / 0); // Infinity
console.log(123 / -0); //-Infinity
console.log(123 / "text"); //NaN(Not a Number)