Thousands march in ‘Invasion Day’ rally in Sydney; NSW has 21,030 new coronavirus cases, 29 deaths; Victoria reports 35 deaths and 13,507 cases; Dylan Alcott named Australian of the Year; Australia Day celebrations begin; Captain Cook monument in Melbourne defaced;

Clear examples do more than decorate an explanation: they show how an idea behaves under recognizable conditions. In education and software documentation alike, strong illustrations begin with a defined goal, then reveal the steps, assumptions, and result without unnecessary detail. A practical test example should state the input, expected output, and boundary condition, because these elements show whether a rule works beyond the simplest case. Including a contrasting case also helps readers distinguish a valid application from a tempting but incorrect one, while concise notes explain why the outcomes differ. When examples are updated with current data and checked against the underlying rule, they remain useful across classrooms, product guides, and professional training.