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C Preprocess Operator (#)

By IncludeHelp Last updated : March 10, 2024

What is Preprocess Operator in C?

The # is a preprocessor operator, which is used to convert an argument into string i.e. quoted string.

C Preprocessor Operator Example

#include <stdio.h>

#define STR(X)	#X

int main(){
    printf("%s\n",STR(Hello world!));
    printf("%s\n",STR(How are you?));
    printf("%s\n",STR(I love programming!));	
    return 0;
}

Output

Hello world!
How are you?
I love programming!

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