interface Todo {
  /** The title of the todo item */
  Todo.title: string
The title of the todo itemtitle: string;
}

const const todo: Readonly<Todo>todo: type Readonly<T> = { readonly [P in keyof T]: T[P]; }
Make all properties in T readonlyReadonly<Todo> = {
  
title: string
The title of the todo itemtitle: "Delete inactive users".String.toUpperCase(): string
Converts all the alphabetic characters in a string to uppercase.toUpperCase(),
};

const todo: Readonly<Todo>todo.title = "Hello";
Cannot assign to 'title' because it is a read-only property.

var Number: NumberConstructor
An object that represents a number of any kind. All JavaScript numbers are 64-bit floating-point numbers.Number.p
parseFloat
parseInt
prototypeNumberConstructor.parseInt(string: string, radix?: number): number
Converts A string to an integer.
@paramstring A string to convert into a number.@paramradix A value between 2 and 36 that specifies the base of the number in `string`.
If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
All other strings are considered decimal.arseInt(const todo: Readonly<Todo>todo.title: string
The title of the todo itemtitle, 10);