What tone and formality is NaN?

"NaN" has a casual & conversational tone and is considered informal in digital communication.

Reference ID: nan

検証済みリファレンス Updated: 2025年1月15日

NaN

Not a Number

Pronunciation: /nan/

主な意味

NaN stands for "Not a Number".

"NaN" stands for "Not a Number". Commonly used in texting contexts and digital communication.

Primary Category Texting

Tone & Register Casual & conversational

Formality Level Informal

First Observed c. 2000s (SMS & Chat Era)

Real-World Chat Example

Alex

Hey, did you get the latest update on NaN?

You

Yes, just reviewed it! Everything looks great.

How it works here: In digital messaging, "NaN" represents "Not a Number" in everyday conversation.

Use "NaN" in casual chats and online communities when referencing "Not a Number".

Common Communication Contexts:

Text messages Direct messages (DMs) Group chats

Alternative spellings: nan, NAN