getting error msg ''??? Undefined function or method 'mtimes' for input arguments of type 'cell'.''. How to eliminate this?

prompt={'a','b','c'};
title='Please enter the following values'; 
answer = inputdlg(prompt,title);
a = answer{1};
b = answer{2};
c = answer{3};

then after few steps.(They are independent.)

A_1 = ((c*a*a*log(abs(1+sqrt(1+a*a))/abs(a)))/(c));

If I run the code it is showing the message ??? Undefined function or method 'mtimes' for input arguments of type 'cell'......

Answer 1

[Star Strider]

The ‘few steps’ may be important. When I run your code as posted, it runs without error and A_1 executes fine.