Is it possible to add statements in between the codes.

For example: If I have a code like this,

```
r(:,1) = a(:,1) - a(:,2);
```

Then can I write it as,

```
r(:,1) = a(:,1)("this is a constant") - a(:,2)("this is a variable");
```

Answer:

You need to comment those statements like this

```
r(:,1) = a(:,1) ... % this is a constant
- a(:,2); % this is a variable
```

for more information read this

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