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symbolic constants are constants represented by symbols....

constants are values that does not change through out the program execution.

e.g

#include<stdio.h>

#include<conio.h>

#define NUM 15

void main()

{

int a=NUM;

printf("The constant is %d",a);

getch();

}

here #define is a preprocessor. its job is to replace all the entries named NUM as 15. So that the compiler works with the constant 15...

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