Functions

• encapsulate logic that manipulates data.

Aspects of functional abstraction:

DRI:

• Domain - the set of arguments it can take

• Range - the set of output values it might return (behavior)

• Intent - the relationship it computes between input and output

Designing Functions

• each function should have exactly one job, identifiable with a short name

• one job, but make it apply to many related situations

• DRY

• define functions generally (pow vs square)