Use data below
Countries: USA, Canada, France, Belgium, Argentina, Luxembourg, Spain, Russia, Brazil, South Africa, Algeria, Ghana
Population in millions: 327, 37, 67, 11, 44, 0.6, 46, 144, 209, 56, 41, 28
Use two arrays that may be used in parallel to store the names of the countries and their populations.
Write a loop that neatly prints each country name and its population.
public static void main(String[] args)
{
// 12 countries and population size
String[] countryName = {"USA", "Canada", "France", "Belgium", "Argentina", "Luxembourg",
"Spain", "Russia", "Brazil", "South Africa", "Algeria", "Ghana"}; //declare the country
int[] populationSize = {327, 37, 67, 11, 44, 1,
46, 144, 209, 56, 41, 28}; // declare the population
// A parallel array are when the position match each other ex usa postion 0 and 327 position 0
for
(
int i = 0; i <=11; i++
)
System.out.printf("Country: %s, Population in millions: %d n", countryName[i], populationSize [i]);
}
}
If you notice from the instructions Luxembourg is suppose to be 0.6 but I put 1. Every time I try to make this a double I get an error. Currently im using int but it has to be a double. Any advice I appreciate it. I already tried changing it to double [] but I still get an error. Changed the population size and the loop below from int to double did not work. Error in java
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Answer
you need to change the populationSize to array of Double and assign double values
use correct format specifier for double, i have used %.2f f is for floating point number, which includes double and 2 says two digits after decimal point
public static void main(String[] args) {
// 12 countries and population size
String[] countryName = {"USA", "Canada", "France", "Belgium", "Argentina", "Luxembourg",
"Spain", "Russia", "Brazil", "South Africa", "Algeria", "Ghana"}; //declare the country
Double[] populationSize = {327.0, 37.0, 67.0, 11.0, 44.0, 0.6,
46.0, 144.0, 209.0, 56.0, 41.0, 28.0}; // declare the population
// A parallel array are when the position match each other ex usa postion 0 and 327 position 0
for (int i = 0; i <=11; i++ ) {
System.out.printf("Country: %s, Population in millions: %.2f n", countryName[i], populationSize [i]);
}
}
Output:
Country: USA, Population in millions: 327.00 Country: Canada, Population in millions: 37.00 Country: France, Population in millions: 67.00 Country: Belgium, Population in millions: 11.00 Country: Argentina, Population in millions: 44.00 Country: Luxembourg, Population in millions: 0.60 Country: Spain, Population in millions: 46.00 Country: Russia, Population in millions: 144.00 Country: Brazil, Population in millions: 209.00 Country: South Africa, Population in millions: 56.00 Country: Algeria, Population in millions: 41.00 Country: Ghana, Population in millions: 28.00