It is a good start, but you should:
- read the help for each function that you use, then you would learn than input does not accept multiple inputs.
- you would also learn that the function input does not return an index, as you have used in your code.
- move the lines sum = ..., table = ... and fprintf... to after the switch (after all, that is the whole point of using that formula!).
- avoid using the variable names sum and table, which are names of important inbuilt functions.
I simplified your code: made input return a simple char vector, provided the correct input to switch, and moved the calculation to after the switch:
shape = input('Choose one of Triangle, Square, Pentagon, or Hexagon: ','s')
switch lower(shape)
case 'triangle'
n = 3;
case 'square'
n = 4;
case 'pentagon'
n = 5;
case 'hexagon'
n = 6;
end
fprintf('n = %g sum of all interior angles is %g degrees \n',n,(n-2)*(180))
Note that this actually follows the guidelines that you were given: "Use the input to define the value of n via a switch/case structure; then use n to calculate the sum of the interior angles in the figure."
