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| Release 4.0 | ||
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Predefined Functions - isNaN
| Function name: | isNaN - Checks whether number is invalid. |
| Synopsis: | isNaN(x) |
| Input data type | Output data type |
|---|---|
| real | bool |
| complex | bool |
| vector | bool |
| quaternion | bool |
Description:
isNaN checks whether the argument is a valid number or not. It returns true if at least one component is not a number ("NaN"). It returns false if all components are valid numbers.