# real sign function

> function which assigns a number (-1,0,1) to a real number according to its sign

**Wikidata**: [Q105356166](https://www.wikidata.org/wiki/Q105356166)  
**Source**: https://4ort.xyz/entity/real-sign-function


## References

1. ISO 80000-2:2019 Quantities and units — Part 2: Mathematics