JSD > JavaScript Basics > Variables > When to use let vs const

When to use let vs const

When to use `let` vs `const`

Use let when you create a variable where you want to have the option of directly reassigning its value (using =) somewhere in your code

    let message

    if (loginSuccessful) {
      message = "welcome back!"
    } else {
      message = "Invalid email or password, please try again"
    }

Use const in all other occasions