Defines

[Atomic_Sheep]

When I write defines, does each define have to be a unique number?

e.g.

//Colours
#define RED 1
#define BLUE 2
 
//Text Size
#define CAPITAL 1
#define LOWERCASE 2

//Colours
#define RED 1
#define BLUE 2

//Text Size
#define CAPITAL 1
#define LOWERCASE 2

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or do you have to make sure that each define has a unique value?