IsUnknown

The IsUnknown() function checks if value has no value.

Syntax

IsUnknown(value)

Returns

A boolean value true if value has no value.

Parameters

• value the value on which the check is performed.

Note: This function is the opposite of the function IsKnown().

Examples

IsUnknown("")   /* false */
IsUnknown(0)    /* false */
IsUnknown(1/0)  /* true */