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module function_example();
// Declare a simple static function
function integer easy_example (input integer a);
easy_example = a;
endfunction
// Basic addition example function
function integer addition (input integer in_a, in_b);
// Return the sum of the two inputs
addition = in_a + in_b;
endfunction
// Declaration of an automatic function
function automatic integer factorial (input integer a);
begin
if (a > 1) begin
factorial = a * factorial(a - 1);
end
else begin
factorial = 1;
end
end
endfunction
// Variable to store function returns
integer rtn;
initial begin
// Call basic function example
rtn = easy_example(10);
$display("Basic function example returned %0d", rtn);
// Call the basic addition example
rtn = addition(1, 1);
$display("addition function return %0d", rtn);
// Call the automatic function
rtn = factorial(5);
$display("factorial of 5 = %0d", rtn);
end
endmodule
// Code your design here
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