Functions

Domain

The domain of a function is the set of all allowed input values.

Meaning

What Is Domain?

The domain of a function is the set of all allowed input values.

The domain of a function is the set of all allowed input values.

Examples

Examples of Domain

1For f(x)=1/x, the domain excludes x = 0.
Understand

Formula and Key Points

  • Know the definition and standard notation for Domain.
  • Be able to recognise or compute domain in a small example.
  • Connect the concept to nearby topics in the same subject before using it in larger CSE problems.
CSE Connection

Why This Matters in Computer Science

Used to model input-output behaviour in programs, APIs, algorithms, transformations and machine-learning pipelines.

FAQ

Domain: Frequently Asked Questions

What is Domain?

The domain of a function is the set of all allowed input values.

Why is Domain useful in computer science?

Used to model input-output behaviour in programs, APIs, algorithms, transformations and machine-learning pipelines.