How do I use an indicator variable to select one of these 4 equations?

var1 = double;
var2 = double; 
indicator = 


A = var1 * var2; 
%var 1 and var 2 are the sides

Vcylinder = var1 * pi * var2^2;
%var 1 is the heigth and var 2 is the radius

Vpyramid = var1^2 * var2/h;
%var 1 is the length and var 2 is the height

Vcone = pi * var1^2 * (var2/3);
%var 1 is the radius and var 2 is the height

This is what I have right now and I have to use my 2 inputs for any of the other equations using an indicator.

Answer 1

[Samiu Haque]

You can use 'switch' statement, like selecting required option as 1,2,3. There may have some other methods which I am not aware of.