c# - What is the difference between 0d and (double)0? -

c# - What is the difference between 0d and (double)0? -

example 1:

if ((value ?? 0d) <= 0d) { //some code }

example 2:

if ((value ?? (double)0) <= (double)0) { //some code }

what difference between these two? , 1 improve use?

both code snippets equivalent, type-cast performed compiler @ compile-time, , result treated constant. note standard behaviour, not compiler optimization; otherwise, not able utilize casts constants:

const double d1 = (double)0; // allowed const double d2 = math.pow(2, 4); // error: "the look beingness assigned 'd2' must constant"

specifying proper literal suffix nonetheless preferred keeps code concise. popular convention specifying doubles append .0:

if ((value ?? 0.0) <= 0.0)

c#