Unable to understand the code

I am doing some basic C# exercises to learn C# which provided the solution to the problems too however, I am unable to understand the code.

Problem:

Write a C# program to check if an integer is within 20 of 100 or 200.

Sample Output:

Input an integer

False

Solution:

public class Exercise22

{

static void Main(string[] args)

{

Console.WriteLine("\nInput an integer:");

int x = Convert.ToInt32(Console.ReadLine());

Console.WriteLine(result(x));

}

public static bool result(int n) {

if (Math.Abs(n - 100) <= 10 || Math.Abs(n - 200) <= 10)

return true;

return false;

}

Can't understand the code below:

if (Math.Abs(n - 100) <= 10 || Math.Abs(n - 200) <= 10)

return true;

return false;

I am a beginner in c# but not in overall programming