# 03. Population

**Description:** Predicts the population based on assumptions about birth and death rate.

## Type in code:

```java
package asu.population;

public class Population {

    public static void main(String[] args) {
        //Given: current pop, birth rate, death rate, imig. rate
        //predict the population for 5 years
        //a birth every 7 seconds
        //a death every 13 seconds

        //an immigrant every 45 seconds.
        int pop = 312032486;
        System.out.println("pop year 0 = " + pop);
        int n = 365 * 24 * 60 * 60;
        int births = n / 7;
        int deaths = n / 13;
        int immigrants = n / 45;
        int net = births + immigrants - deaths;
        int years = 5;
        for (int i = 1; i <= years; i = i + 1){
            pop = pop + net;
            System.out.println("pop year " + i + " = " + pop);
        }
    }

}
```

## Sample Output:

```
pop year 0 = 312032486
pop year 1 = 314812582
pop year 2 = 317592678
pop year 3 = 320372774
pop year 4 = 323152870
pop year 5 = 325932966
```
