What is the result of the following TypeScript code snippet regarding type inference? let value = “Hello”; value = 42;

Question

TypeScript Professional — Easy

What is the result of the following TypeScript code snippet regarding type inference? let value = “Hello”; value = 42;

Accepted Answer

TypeScript uses type inference to determine the type of a variable based on its initial value. In this snippet, 'value' is initialized with a string, so TypeScript infers its type as 'string'. Attempting to assign a number (42) to a variable typed as 'string' results in a compile-time error. TypeScript is statically typed, not dynamically typed, and it does not require explicit annotations when inference is possible.