##  [Off-by-One Error](/index.php/one-error) 

  ##  [Off-by-One Error](https://natural.quantumdictionary.io/one-error-0) 

  

 [![Natural & Formal Sciences Dictionary](/sites/default/files/styles/large/public/2026-01/Natural%20%26%20Formal%20Sciences.png.webp?itok=2kCDRVQv)](/index.php/topic-specific-dictionaries/natural-formal-sciences)



**Natural & Formal Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A logic error where an index, loop bound, or count includes or excludes an endpoint incorrectly, producing a one‑element discrepancy that can cause wrong results or out‑of‑range accesses.