A one-to-one function, also known as an injective function, is a mathematical relationship between two sets where each element in the domain maps to a unique element in the codomain.
In other words, for every distinct pair of elements in the domain, the function assigns distinct values in the codomain.
This ensures that no two different elements in the domain are mapped to the same element in the codomain.
One-to-one functions are valuable in various mathematical and practical contexts, such as in cryptography and data analysis, where uniqueness is crucial.