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## Display Progress

MuPAD® notebooks will be removed in a future release. Use MATLAB® live scripts instead.

MATLAB live scripts support most MuPAD functionality, though there are some differences. For more information, see Convert MuPAD Notebooks to MATLAB Live Scripts.

By default, MuPAD® procedures do not show progress information or comments on run time. For example, create the following procedure that returns the sign of an input number. (MuPAD provides the standard function `sign` for this task.)

```S := proc(z:Type::Numeric) begin if not(testtype(z, Dom::Real)) then z/abs(z) elif z > 0 then 1 elif z < 0 then -1 else 0 end_if end_proc:```

When you execute this procedure, it returns only the final result:

`S(10)`
` `

Typically, the final result is all that your users want to see. However, if executing a procedure takes a long time or if users can benefit from the comments on some procedure steps, you can extend the procedure to include additional information. To embed the progress information into your procedure, use the `print` function. For example, modify the procedure `S` so it reports its progress:

```S := proc(z:Type::Numeric) begin print(Unquoted, "Is ".expr2text(z)." a real number?"); if not(testtype(z, Dom::Real)) then print(Unquoted, expr2text(z)." is a complex number. Computing... the sign of ".expr2text(z)." as z/|z|"); z/abs(z); else print(Unquoted, expr2text(z)." is a real number"); print(Unquoted, "Is ".expr2text(z)." a positive number?"); if z > 0 then print(Unquoted, expr2text(z)." is a positive number"); 1 else print(Unquoted, expr2text(z)." is not a positive number"); print(Unquoted, "Is ".expr2text(z)." a negative number?"); if z < 0 then print(Unquoted, expr2text(z)." is a negative number"); -1 else print(Unquoted, expr2text(z)." is not a negative number"); print(Unquoted, expr2text(z)." is zero."); 0 end_if end_if end_if end_proc:```

Now the procedure `S` displays the status messages:

`S(0)`
```Is 0 a real number? ```
```0 is a real number ```
```Is 0 a positive number? ```
```0 is not a positive number ```
```Is 0 a negative number? ```
```0 is not a negative number ```
```0 is zero. ```
` `

#### Mathematical Modeling with Symbolic Math Toolbox

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