- Data type: values + allowed operations (primitive vs. complex)
- int: Java's primitive whole-number type; an integer is the general math concept it represents
- boolean: true/false; often the result of comparing ints
- Method: reusable named code block; "calling" runs it
- "Returns an int" = the call evaluates to an int
- Same-named int in different methods = independent
- "Driver" pattern: a class whose
main uses other classes