Printing Text and Numbers

When printing a text, numbers and other data on the console, we can join them by using templates {0}, {1}, {2} etc. In programming, these templates are called placeholders.

var firstName = Console.ReadLine();
var lastName = Console.ReadLine();
var age = int.Parse(Console.ReadLine());
var town = Console.ReadLine();
Console.WriteLine("You are {0} {1}, a {2}-years old person from {3}.",
  firstName, lastName, age, town);

Here is the result we are going to receive after the execution of this example:

Notice how every variable should be given in the order, in which we want it to be printed. Practically, the template (placeholder) accepts variables from every type.

It is possible for a template to be used multiple times and it is not necessary for the templates to be numbered sequentially. Here is an example:

Console.WriteLine("{1} + {1} = {0}", 1+1, 1);

The result is:

1 + 1 = 2

Testing in the Judge System

Test your solution here:

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