Is there any hotkey available to jump between begin and end function?

There are no commands to jump to beginning or end of a function. There are just standard text editing caret moving commands like moving caret to begin/end of next/previous word/paragraph.

But with customizing in the wordfile:
it is possible to quickly jump (and select) to begin/end of a function. It is also possible to use words here and not just braces.

Another and perhaps best method is creating two macros with a hotkey assigned to both macros stored together in a macro file automatically loaded on startup which run a find downwards (end of function) or upwards (begin of function).