Home > DeveloperSection > Interviews > What is the difference between constants and read-only variables that are used in programs?

Posted on    September-02-2014 11:10 PM

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Sumit Kesarwani

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Posted on    September-02-2014 12:00 AM

Constants perform the same tasks as read-only variables with some differences. The differences between constants and read-only are


Constants are dealt with at compile-time.

Constants supports value-type variables.

Constants should be used when it is very unlikely that the value will ever change.


Read-only variables are evaluated at runtime.

Read-only variables can hold reference type variables.

Read-only variables should be used when run-time calculation is required.

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