How do I store a function file to a variable?

I use a function file to run some computations and it looks something like this

x_max(<input1,input2>=answer

after the function computes my command window displays

ans=<answer>

I would like to know how to store this answer a variable for which i could display using fprintf. For example, I would like to display something like

"the value of x_max is <answer>"

Answer 1

[James Tursa]

Something like this assuming your function name is x_max

my_variable = x_max(input1,input2);
fprintf('The value of x_max is %g\n',my_variable);