Declaring and initializing a Dictionary in TypeScript

Hello colleagues! I'm new to TypeScript (previously wrote in plain JS) and encountered a problem when declaring a dictionary (associative array). In JavaScript I did this: ```typescript let dict = {}; dict["key1"] = "value1"; dict["key2"] = 123; ``` And it worked fine. But in TypeScript I need to strictly type the dictionary where keys are strings and values are numbers. I tried several options, but everywhere I get compilation errors or strange behavior. Option 1: ```typescript let dict = {}; dict["apple"] = 5; // Error: Element implicitly has an 'any' type ``` Option 2: ```typescript let dict: object = {}; dict["apple"] = 5; // Error: Property 'apple' does not exist on type 'object' ``` Option 3: ```typescript let dict: { [key: string]: number } = {}; ```