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A variable changes. It varies.
A non variable does not change. It is constant.
For example if I write a mathematical expression such as x + 1, then x is a variable. Its value can be whatever value we choose. However 1 is a non variable. Its value is 1 and never changes from 1.
In a scientific experiment a variable would be something that you changed from one test to another. A non variable would be something that remained constant from test to test.
As a final example: the speed at which light travels in a vaccum is a constant. It is referred to by the letter c which stands for the universal constant. However, the speed at which your car travels is a variable. It changes.
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Difference between variable resistor and rheostat?
The difference between a variable resistor and a rheostat is the same as the difference between six and half a dozen.
What is one difference between a variable expression and a numerical expression?
The variable.
What is the difference between a variable and a literal in prgramming?
a literal is a constant value, the difference is a variable can change it's value.
What is difference between an integer variable and floting point variable?
The set of the possible values.
What is the difference between independence an dependence variable?
It good
