. . . . . . . . is used to improve the appearance of numbers in an interface.

Format function
Appear function
Val function
Number function

The correct answer is: A. Format function

A format function is used to improve the appearance of numbers in an interface. It can be used to change the number’s font, size, color, and alignment. It can also be used to add leading and trailing zeros, commas, and decimal points.

The other options are incorrect because:

  • B. Appear function is not a valid function.
  • C. Val function is used to convert a string to a number.
  • D. Number function is used to create a new number object.