+A **constant** is a [value](/wiki/Value) or quantity that remains fixed and unchanging. Unlike a [variable](/wiki/Variable), its state does not alter across different contexts or over time. Constants are fundamental to [mathematics](/wiki/Mathematics) and [physics](/wiki/Physics), representing foundational truths.
+## See also
+- [Number](/wiki/Number)
+- [Parameter](/wiki/Parameter)
+- [Formula](/wiki/Formula)
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