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Practice
Spot a missing return
A function calculates result = hours * rate but has no return statement. What value does Python return implicitly?
Function contract trace
A caller supplies values and receives one defined result
- ContractDefine inputs, output, and failures
- ArgumentsEvaluate supplied values
- ParametersBind local names
- BodyRun focused local logic
- ReturnSend the result to the caller
- TestCheck the public contract
Keep argument evaluation, parameter binding, local state, return behavior, and external side effects visible at the function boundary.