Which term describes a variable that does not change value?

The term that describes a variable that does not change value is "constant." In programming, mathematics, and various fields of science, a constant is recognized as a value that remains the same throughout a specific context or operation. This characteristic allows constants to provide stability in calculations and functions, making them essential in formulas and equations where a fixed value is needed for consistent results.

While "fixed" might seem similar, it often implies a variable that is unchanging but can have different interpretations depending on context. The term "dynamic" refers to variables that can change, and "variable" clearly describes changing values. Hence, the specificity of the term "constant" reinforces its definition as an unchanging value, which is why it is the correct term in this case.