FAQ: Learn Java: Manipulating Variables - String Concatenation


This community-built FAQ covers the “String Concatenation” exercise from the lesson “Learn Java: Manipulating Variables”.

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This exercise can be found in the following Codecademy content:

Learn Java

FAQs on the exercise String Concatenation

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why is the string zooDescription written like this ?

public class Zoo {
public static void main(String args){
int animals = 12;
String species = “zebra”;
String zooDescription = "Our zoo has " + animals + " " + species + “s!”;




Hi. It took me a little bit to figure out why the solution was correct too.

The seemingly random double quotes between ‘+ animals’ and ‘+ species’ contain an invisible space which is needed to have a space between the number of animals and type of species. Without the double quotes around the space, the result would be “12zebras!” instead of the correct “12 zebras!”.

Hope that helps.