A Gentle Introduction to
Perl Programming

Tutorial: More than one accumulator

In these examples we accumulate more than one value. We still only need one loop - we just do more work in each.

1. Average population

Calculate the average population size for the countries of the world.

Print the total population by the number of countries.

test text

2. Is 3 million the median?

Show the number of countries with a population more than 3000000

Show the number of countries with a population less than 3000000

test text

3. USA and the world

Show the GDP of "United States" as a percentage of the world GDP.

How to calculate

Accumulate the total gdp (including the "United States") as totGDP. Also accumulate the gdp of "United States" as usaGDP. Print the value 100*usaGDP/totGDP

test text