object

Any instance of the Error object.

An error number is a 32-bit value. The upper 16-bit word is the facility code, while the lower word is the actual error code. To read off the actual error code, use the & (bitwise And) operator to combine the number property with the hexadecimal number 0xFFFF.

The following example causes an exception to be thrown, and displays the error number.

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function getAge(age) { if(age < 0) throw new Error(100) print("Age is "+age+"."); } // Pass the getAge an invalid argument. try { getAge(-5); } catch(e) { // Extract the error code from the error number. print(e.number & 0xFFFF) }

The output of this code is:

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100

Version 5

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