I have written this script:

function sum = Sum2(x,y,z)

s = 0;

for i=0:min(x,y)

for k=0:y-i

s = s + (-1)^k * QuantumDimension(2*x+k-2*i, 2*y-2*k-2*i) * Twist(2*x+k-2*i, 2*y-2*k-2*i)^(z/2);

end

end

s

When I type Sum2(5,3,2) it gives me an appropriate output

but then I have the script

function sum = Sum3(x,y,z)

s = 0;

for i=0:min(x,y)

s = s + (-1)^k * QuantumDimension(2*x-2*i, 2*y-2*i) * Twist(2*x-2*i,2*y-2*i)^(z/2);

end

end

s

And when I type Sum3(5,2,1) I get:

Error: File: Sum3.m Line: 8 Column: 1

This statement is not inside any function.

(It follows the END that terminates the definition of the function "Sum3".)

What the heck?!?!? The placement of s in the script is completly similar to the function Sum2… What is going on here!! Thanks

## Best Answer