"What are the key differences between var, let, and const in JavaScript, and when should each be used?"
var is function-scoped and allows redeclaration, which can cause bugs. let is block-scoped and doesn't allow redeclaration, making it safer. const is also block-scoped but used for values that shouldn't change.
var is function-scoped and allows redeclaration, which can cause bugs. let is block-scoped and doesn't allow redeclaration, making it safer. const is also block-scoped but used for values that shouldn't change.
