Hallo vs Undefined - What's the difference?

As adjectives the difference between hallo and undefined

is that hallo is auditory while undefined is lacking a definition or value.

is hello (used only when answering phone).

(en interjection)

A variant of hello

A cry of surprise.

* 1890 , ,

It sounds like a sum in the rule of three. The answer should give us the — But hallo ! here are the accredited representatives of the law.

(en noun)

The cry "hallo!"

A shout of exultation.

(en verb)

To shout, or to call with a loud voice.

To chase while shouting "hallo!"

To cry "hallo" (to someone).

To shout (something).

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(wikipedia undefined) (-)

Lacking a definition or value.

(mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.

The result of division by zero is undefined .

* defined