C constants 🚫 

#include int main(){ // constant = fixed value that cannot be altered by the program during its execution const float PI = 3.14159; //PI = 420.69; YOU CAN'T CHANGE THIS printf("%f", PI); return 0; }

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You pretty much hit the nail on the head. Constants (in pretty much any language, not just C) can never be altered; This data type is extremely useful for when you want fixed int values; you provided a perfect example with "Pi" there. In Java, for instance, you may want to use a "double pi = 3.141592654357...", but if somebody changes the value, your program could go haywire altogether! Constants help to relieve this issue.

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Awesome.

constants are useful!

The best

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Why wouldn't be 420.69 tho? 😥

what about #define pi 3.14

What I understand: You cannot change constants. :)

pi = 420.69 yessir

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