Try it yourself:
| @1 |
null
|
null represents intentional absence of a value. It is not zero, an empty string, or NaN.
Use nullish() to supply a default, typeOf() to inspect data, and isNumeric() before arithmetic. NaN instead represents an invalid numeric result.
Decide whether null means unknown, not applicable, or missing; those meanings may need different handling.
Enter null on a calculator line to see its built-in value, or place the name inside a longer expression. Keep any displayed unit attached when converting or combining physical quantities, and check that every other value uses a compatible dimension.
The example above is editable, so you can replace surrounding values and test the constant in your own formula. Browse all constants to compare related values and notation.