Checks a Laplace expression for correctness
| Number | Type | Compulsory | Default | Description |
| 1 | string | Yes | Expression to be analysed |
Expression to be analysed
Return type: real
Integer value from -1 to 4 signifying the validity of the Laplace expression.
| Value | Description |
| } | |
| -1 | Unknown error in expression |
| 0 | Expression is valid |
| 1 | Syntax error in expression |
| 2 | Mismatched parantheses in expression |
| 4 | Expression uses an unknown function |
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| ◄ Char | ChooseDir ▶ | |