what's the difference between f and f(x) in matlab?

here is our inline function

syms x

f=inline(char(x^2));

and i want to make a new function g=sqrt(f) i.e. i want to make a new function abs(x).

so i type g=inline(char(sqrt(f))).

But it doesn't work and matlab says that 'Undefined function 'sqrt' for input arguments of type 'inline'

so i type g=inline(char(sqrt(f(x)))).

then, MATLAB accept my function g.

i don't know what is the difference between f and f(x) :(

Answer 1

[Azzi Abdelmalek]

To know the difference type

whos f
d=f(x)
whos d

[dongman]

WOW!!!! Thank you very much :D

[Uma Shankar]

Amazing! this will help alot with Matlab.