What does the M stand for in C# Decimal literal notation?

In order to work with decimal data types, I have to do this with variable initialization:

decimal aValue = 50.0M;

What does the M part stand for?

It means it's a decimal literal, as others have said. However, the origins are probably not those suggested elsewhere in this answer. From the C# Annotated Standard (the ECMA version, not the MS version):


The decimal suffix is M/m since D/d
was already taken by double.
Although it has been suggested that M
stands for money, Peter Golde recalls
that M was chosen simply as the next
best letter in decimal.

A similar annotation mentions that early versions of C# included "Y" and "S" for byte and short literals respectively. They were dropped on the grounds of not being useful very often.

Stack Overflow Q#977484, score: 562