Cast a Double Variable to Decimal

c# casting decimal currency
flo picture flo · May 15, 2011 · Viewed 136.4k times · Source

How does one cast a double to decimal which is used when doing currency development. Where does the M go?

decimal dtot = (decimal)(doubleTotal);

Answer

Guffa picture Guffa · May 15, 2011

You only use the M for a numeric literal, when you cast it's just:

decimal dtot = (decimal)doubleTotal;

Note that a floating point number is not suited to keep an exact value, so if you first add numbers together and then convert to Decimal you may get rounding errors. You may want to convert the numbers to Decimal before adding them together, or make sure that the numbers aren't floating point numbers in the first place.

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