JavaScript: Number.prototype.toString

(number).toString()

Convert a number to string.

console.log((30).toString() === "30");

(number).toString(radix)

Use base radix.

// int to binary string
console.log((3).toString(2) === "11");
console.log((16).toString(2) === "10000");

// int to hexadecimal
console.log((15).toString(16) === "f");
console.log((200).toString(16) === "c8");