What is the difference between implicit function & explicit function.

Implicit cursor we have to open and close for  it's usage.It will not automatically close.


Explicit cursor will automaticlly open and close.


eg: for x in (exp.)
   
   where x is the cursor name exp. is an expression.This will automatically open the cursor x and will close at the time of "end loop"

A function in which the dependent variable has not been given in terms of the independent variable is known as implicit function.Ex: 2x-y = 3

A function which determines the output value in terms of the input value x then such functions are known as explicit functions.Ex: y = 2x-3 so that:
y = f(x) where f(x) = 2x-3.

is the equation of circle is explicit function or not