Member Avatar for VSURE

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. Use let for variables that may change and const for constants. Avoid var in modern JavaScript for cleaner, predictable code.

  • 2 Contributors
  • 1 Reply
  • 39 Views
  • 4 Days Discussion Span
  • Latest Post Latest Post by JuanB
rproffitt commented: Matches chatgpt output too closely IMO. -4
Member Avatar for JuanB

var: Function-scoped, can be reassigned and redeclared, hoisted with undefined initialization.
let: Block-scoped, can be reassigned but not redeclared in the same scope, hoisted with a "temporal dead zone."
const: Block-scoped, cannot be reassigned or redeclared, hoisted with a "temporal dead zone."

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.