entity whose value does not change

The term for an entity whose value does not change is “constant.”

Quick Scoop: What does that mean?

• In math, a constant is any fixed value that does not change, like 2, 10, or π\pi π.

• In programming, a constant is a data item whose value cannot be altered while the program runs.

• This is the opposite of a variable, whose value can change.

A simple example

• Number 10 is a constant: its value stays 10 no matter what else is happening.

• In a formula like y=mx+cy=mx+cy=mx+c, mmm and ccc are treated as constants for that equation.

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