Write MATLAB code to compute the absolute value of a variable named $"x"$ using the following process, without using any MATLAB functions $($i$.$e$.,$ you cannot use the MATLAB abs$()$ function$).$

assume the variable $x$ is defined and has some numeric value that is either positive or negative prior to execution of the code.

If the value of $x$ is negative, multiply the value of $x$ by negative one $(-1)$ to make it a positive value with the same magnitude.

If the value of $x$ is zero or positive, do nothing.