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A Gentle Introduction to
Java Programming

Tutorial: Adding values

 

1. Total area


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Calculate the total area of the world.

This time we add to the accumulator each time. We can use either of the statements below: 

acc = acc + area;
acc += area;

2. Total population


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Calculate the total population of the world.

The answer - at a little over 6 billion will be too large for and int. Use a long instead.

3. Total GDP of Africa


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Calculate the total GDP of the countries of Africa.

4. Total GDP of the 'West'.


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Calculate the total GDP of the western world. Include the regions "North America", "Europe" and "Oceania" as the western world.