Can a function expression be used before it is defined in the code?

  • No, function expressions can only be used after their definition.
  • Yes, function expressions are hoisted and can be used before they are defined.
  • It depends on whether the function expression is named or anonymous.
  • No, function expressions are not valid in JavaScript.
Function expressions are not hoisted in JavaScript, which means they can only be used after they are defined in the code. Attempting to use a function expression before its declaration will result in an error. This is different from function declarations, which are hoisted and can be used before their declaration. It's essential to understand this behavior to avoid bugs and unexpected behavior in your JavaScript programs.
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