Java: Variables and Concatenation
To consolidate the previous topic, try using variables with concatenation. Syntactically nothing changes: we can concatenate (glue) two lines:
var what = "Kings" + "road";
System.out.print(what); // => "Kingsroad"
... which means we can concatenate a string and one variable in which the string is written:
var first = "Kings";
var what = first + "road";
System.out.print(what); // => "Kingsroad"
... and even concatenate two variables in which the lines are written:
var first = "Kings";
var last = "road";
var what = first + last;
System.out.print(what); // => "Kingsroad"
Instructions
Sites are constantly sending emails to their users. A typical task is to make an automatic sending of a personal letter, where the user name is in the header. If somewhere in the site base the name of the person is stored as a string, then the task of generating the header is reduced to concatenation: for example, you need to glue the string Hello with the string where the name is written.
Write a program that will generate the header and body of the letter, using the ready-made variables, and display the resulting lines on the screen.
For the title, use the variables firstName and greeting, a comma and an exclamation point. Display it in the correct order.
For the body of the letter, use the variables info and intro, with the second sentence should be on a new line.
The result on the screen will look like this:
Hello, Joffrey!
Here is an important information about your account security.
We couldn't verify you mother's maiden name.
Perform the job using only two System.out.print.
The exercise doesn't pass checking. What to do? 😶
If you've reached a deadlock it's time to ask your question in the «Discussions». How ask a question correctly:
- Be sure to attach the test output, without it it's almost impossible to figure out what went wrong, even if you show your code. It's complicated for developers to execute code in their heads, but having a mistake before their eyes most probably will be helpful.
In my environment the code works, but not here 🤨
Tests are designed so that they test the solution in different ways and against different data. Often the solution works with one kind of input data but doesn't work with others. Check the «Tests» tab to figure this out, you can find hints at the error output.
My code is different from the teacher's one 🤔
It's fine. 🙆 One task in programming can be solved in many different ways. If your code passed all tests, it complies with the task conditions.
In some rare cases, the solution may be adjusted to the tests, but this can be seen immediately.
I've read the lessons but nothing is clear 🙄
It's hard to make educational materials that will suit everyone. We do our best but there is always something to improve. If you see a material that is not clear to you, describe the problem in “Discussions”. It will be great if you'll write unclear points in the question form. Usually, we need a few days for corrections.
By the way, you can participate in courses improvement. There is a link below to the lessons course code which you can edit right in your browser.
Tips
Consider with which line and in what order you need to glue the modules.variables together in order to get such a two-line output of the letter body.
Remember that you can create a string that contains only the control sequence
\n.