hope it is easy one
can any one help me in this regard
how to pass arrays to userdefined functions like
sum(A3:A10) -- my_fun(A3:A10) and how to use those values in the function
that i write?

one more thing is

if i have a list of data(numbers) and i have to count the numbers that fall
in a given range like

if i have 70 45 84 96 85 74 12 36 45 i have to count the number is more
than 50 and numbers less than 50.

is there any function for this.
please help me in this regard