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C# C# Objects Loops and Final Touches Magic Numbers and Constants

Duc Duong
Duc Duong
8,670 Points
Posted by Duc Duong
Duc Duong
8,670 Points

"readonly" and "const" type??

I wonder if these 2 types "readonly" and "const" have any differences?

1 Answer

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

A "const" can only be assigned by initialization during the compile. A "readonly" can be assigned in a constructor at run-time.

Jun Dong
Jun Dong
4,754 Points
Jun Dong
Jun Dong
4,754 Points

So it's okay to switch out the const keyword and replace it with readonly and it'll work the same?

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

My point was that they are different. For example, you couldn't use "const" for something that was going to get set to a value that is unknown until an object instance is being created as the program runs.