Dependent upon the variables, you need to take into consideration factors that can affect the outcome of the result; what will make the result vary in any way.
If this, for example, entails the variable to be kept constant time, you will monitor the time and repeat it throughout the experiment.
This is my understanding of constant variables; hope this helped.
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The two types of variables are the CONSTANT and CONTROL.
The Control Variable
Yes they di
No they are not the same. A constant variable keeps going at a constant rate.
In programming, variables change all the time. In scientific testing you control variables to determine what other changes occur.