Is it posiblle to use something alike f@() to instead of function call f[]

Questions
1

I learned C and Java before learning Mathematica. So I don’t like using f[] to call a function.
Is it posiblle use other symbols to instead of f[]?

Prime@4 (worked!, return 7)

Plot@( x, {x, 0, 6 Pi} ) (Syntax::sntxf: “(” cannot be followed by “x,{x,0,6Pi})”.)}

Plot @@ {Sin@x, {x, 0, 6 Pi}} (worked!)

2

Plot @@ {Sin@x, {x, 0, 6 Pi}}will work most of the time. However, this syntax does not protect the variable x from ouside assignments: x = 1; Plot @@ {Sin@x, {x, 0, 6 Pi}} will give an error, because the x will be given the value 1 before Plot starts its job.

3

Here are three ways of calling a function:

f[n_] := n + 5

f[10]
f@10
10 // f

All we give 15.