What does return 0 mean in C language?

The meaning of return 0 in c language:

Recommended: "c Language Tutorial"

1. Return value int Type of function return:

The return statement is used to end the loop or return the value of a function.

return 0: Generally used at the end of the main function, according to the general practice of program development, indicating the successful completion of this function.

2. Boolean type return:

return 0: return false;

return 1: return true;

Examples are as follows:

int main() 
{ 
int a；// 前面一些其他运行// ....// 到最后 
if (a == 100) {
 return 0; 
 } else {
  return -1;
   }
   }

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