let and const are used to declare variables that can be reassigned, but let has block scope, while const has function scope. var is used to declare variables that cannot be reassigned and have block scope.

let and var are used to declare variables that can be reassigned, but var has block scope, while let has function scope. const is used to declare variables that cannot be reassigned and have block scope.

const and var are used to declare variables that can be reassigned, but const has block scope, while var has function scope. let is used to declare variables that cannot be reassigned and have block scope.

let and var are used to declare variables that can be reassigned, but let has block scope, while var has function scope. const is used to declare variables that cannot be reassigned and have block scope.

Variables in JavaScript are used to store and manipulate data

Variables do not exist in Javascript. This is an interpreter language, so it doesn't need them.

Variables in Javascript exist only on the server side, where there is access to databases

Variables in Javascript exist to call modal windows of the user interface