3.1.1 The Difference between a variable and a constant

What is the difference between a variable and a constant?

In maths and computing, a variable is a symbol, number ore letters that represent a value.
Python variables are like this:

name = “Bob the builder”

A variable is something that needs to change though out the program.
A constant is something that needs to stay the same and can't change. In the c programming language a constant looks like this: 
int const a = 1;

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