A function maps each input in its domain to exactly one output.
What Is Function?
A function maps each input in its domain to exactly one output.
Examples of Function
1
f(x) = x² maps 3 to 9.Formula and Key Points
Formula / rule
y = f(x)
- Know the definition and standard notation for Function.
- Be able to recognise or compute function in a small example.
- Connect the concept to nearby topics in the same subject before using it in larger CSE problems.
Why This Matters in Computer Science
Used to model input-output behaviour in programs, APIs, algorithms, transformations and machine-learning pipelines.
Related Math Terms
Function: Frequently Asked Questions
What is Function?
A function maps each input in its domain to exactly one output.
Why is Function useful in computer science?
Used to model input-output behaviour in programs, APIs, algorithms, transformations and machine-learning pipelines.