https://www.typescriptlang.org › docs › handbook › variable-declarations.html

Learn how TypeScript supports let and const, two new variable declarations in JavaScript that avoid common pitfalls of var. Compare the scoping, initialization, and assignment rules of let, const, and var with examples and code snippets.

https://stackoverflow.com › questions › 35572895

This is why TypeScript (and ES6) introduces the let keyword to allow you to define variables with true block scope. That is, if you use let instead of var , you get a true unique element disconnected from what you might have defined outside the scope.

https://www.tutorialsteacher.com › typescript › typescript-variable

Learn how to declare variables in TypeScript using var, let and const keywords, and how they differ in scope and behavior. See examples of block-scoped let variables, redeclaration errors, constant variables and object sub-properties.

https://www.freecodecamp.org › news › var-let-and-const-whats-the-difference

var variables can be updated and re-declared within its scope; let variables can be updated but not re-declared; const variables can neither be updated nor re-declared. They are all hoisted to the top of their scope.

https://www.javaguides.net › 2023 › 12 › difference-between-var-and-let-in-typescript.html

This post provides a clear and concise explanation of the differences between var and let in TypeScript, complete with examples, outputs, and guidelines on when to use each. The var keyword declares a variable in the function scope or globally if declared outside of a function.

https://medium.com › swlh › typesript-let-vs-const-vs-var-a09de69998ea

The var keyword should not be used while building a new typescript application. The let keyword is block scoped; Const is for block-scoped variables and immutable variables

https://www.typeerror.org › docs › typescript › variable-declarations

let and const are two relatively new concepts for variable declarations in JavaScript. As we mentioned earlier, let is similar to var in some respects, but allows users to avoid some of the common “gotchas” that users run into in JavaScript. const is an augmentation of let in that it prevents re-assignment to a variable.