Help me with the output of c code and need explanation

Question

int main() {

#if !SOLO

printf("Try Again");

#else

printf("SoloLearn"); #endif

return 0;

}

Answer 1

If output is what you want, then you can simply run it.

Explanation:

#if !SOLO

Is a conditional evaluation. Which verifies whether something named SOLO was defined with a boolean-like value. When SOLO is defined using #define directive (for example),

#define SOLO 1

Then it is understood as being defined, and it has boolean-like value true (for having non-zero value). And code execution flows into `#else` block.

If SOLO was not defined, or was defined with boolean-like value false (zero), then code execution flows into `#if` block.

Reference:
http://www.cplusplus.com/doc/tutorial/preprocessor/

Answer 2

Ipang thans a lot