Single, Double

In C# programming, we hear about float and double. But these types are syntactic sugar—we can refer to them as Single and Double.

They have no differences from the common types they are aliased to. In C# programming, we often hear about a Double, but less commonly about a Single.

Alias chart

To understand Single and Double, we can simply remember that float is the same thing as Single. One type is aliased to another at the language level.

 float -> Single
double -> Double

Example

This program creates an instance of the Single and Double types. It then prints their types to the console window. Then it does the same thing for the float and double types.

using System;

{
    Single a = 1;
    Double b = 1;
    Console.WriteLine(a.GetType());
    Console.WriteLine(b.GetType());
}
{
    float a = 1;
    double b = 1;
    Console.WriteLine(a.GetType());
    Console.WriteLine(b.GetType());
}
System.Single
System.Double
System.Single
System.Double

Discussion

The Single and Double types are precisely equivalent to the float and double types. It is more conventional for C-style language programmers to use float than Single.

This article doesn't provide useful examples for Single or Double. It demonstrates that these types are precisely equivalent to the float and double types.