identityvaluefunction
nounUK /aɪˈdɛntɪti ˈvæljuː ˈfʌŋkʃən/
US /aɪˈdɛntɪti ˈvæljuː ˈfʌŋkʃən/
A rule that gives back the same number you put in.
For the identity value function, putting in 7 gives you 7 right back.
OTHER MEANINGS
2. A function that always returns its input unchanged, often written as f(x) = x.
The identity value function leaves every number exactly as it was.
3. In math, a rule where the output equals the input for every possible value.
Teachers use the identity value function to show how inputs and outputs can match.
4. A simple mapping that pairs each item with itself.
In the list, the identity value function matched each name to the same name.