What is Function Wizard in Excel?

https://www.computersprofessor.com/2016/05/what-is-function-wizard-in-excel.html
The function wizard (fx) is available
on the standard tool bar as an icon. You can select the function category and
can choose the required function from the function wizard.
When
you select a particular function from different function categories such as
mathematical function, statically function, logical function or string function
etc…Then excel displays a dialogue box to select the range to apply and you
need to specify the arguments to that function so that it displays the result
in the designated cell after calculations.