It is possible to define something like 'between' in if-else statement in C#?

Question

I want to ask someone who has stronger skills than me in C#.

Is it possible to reduce the following code

if(val > 20 && val < 40 )
...
else
if(val > 40 && val < 72 )
...
else
if(val > 72 && val < 88 )
...
else
...

Let's assume that I have over 10-11 if-else statements.

What's the best way to shorten the above code?

I thought at something like between in sql.

Answer 1

Define an extension method:

public static bool Between(this int source, int a, int b)
{
    return source > a && source < b;
}

Then, use it:

if (val.Between(20, 40))
//...

---

As oɔɯǝɹ correctly pointed out in his comment, you could go one step further and support all implementers of IComparable<T> with a generic extension method:

public static bool Between<T>(this T source, T a, T b) where T : IComparable<T>
{
    return source.CompareTo(a) > 0 && source.CompareTo(b) < 0;
}