Question

Write a loop that prints each country's population in country_pop. Sample output with input:

Answer 1

Answer:

1. country_pop = {
2.    'China': 1365830000,
3.    'India': 1247220000,
4.    'United States': 318463000,  
5.    'Indonesia': 252164800
6. }  
7. for key in country_pop:
8.    print(key + " has " + str(country_pop[key]) + " people")

Explanation:

The solution code is written in Python 3.

Given a dictionary, country_pop with data that includes four country along with their respective population (Line 1-6). We can use for in loop structure to traverse through each of the key (country) in the dictionary and print their respective population value (Line 7-8). The general loop structure through is as follow:

                    for key in dict:

                         do something

One key will be addressed for each round of loop and we can use that key to extract the corresponding value of the key (e.g. country_pop[key]) and print it out.