C Programming/Constants: Difference between revisions
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(Created page with "There are two simple ways in '''C''' to define constants: # Using <code>#define</code> preprocessor. # Using <code>const</code> keyword. == The #define Preprocessor == <synta...") |
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| Line 8: | Line 8: | ||
#include <stdio.h> | #include <stdio.h> | ||
#define LENGTH 10 | #define LENGTH 10 | ||
#define WIDTH | #define WIDTH 5 | ||
#define NEWLINE '\n' | #define NEWLINE '\n' | ||
Revision as of 05:01, 5 February 2018
There are two simple ways in C to define constants:
- Using
#definepreprocessor. - Using
constkeyword.
The #define Preprocessor
//main.c
#include <stdio.h>
#define LENGTH 10
#define WIDTH 5
#define NEWLINE '\n'
int main()
{
int area;
area = LENGTH * WIDTH;
printf("value of area : %d", area);
printf("%c", NEWLINE);
return 0;
}
The const Keyword
//main.c
#include <stdio.h>
int main()
{
const int LENGTH = 10;
const int WIDTH = 5;
const char NEWLINE = '\n';
int area;
area = LENGTH * WIDTH;
printf("Value of Area : %d", area);
printf("%c", NEWLINE);
return 0;
}