Const (computer programming): Difference between revisions

Revision as of 11:39, 21 December 2023

Revision as of 04:10, 4 January 2024

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== Distinction from constants ==

While a constant does not change its value while the program is running, an object declared <code>const</code> may indeed change its value while the program is running. A common example are read only registers within embedded systems like the current state of a digital input. The data registers for digital inputs are often declared as <code>const</code> and <code>[[volatile (computer programming)|volatile]]</code>. The content of these registers may change without the program doing anything (<code>volatile</code>) but youit shallwould notbe ill-formed for the program to attempt write to them either (<code>const</code>).

== Other uses ==