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Function declaration and definition

int main(void) {
  printf("Hello World!");
  return 0;
}

The function consists of two parts

void myFunction() { // declaration declaration
  // function body (code to be executed) (definition)
}
  • Declaration declares the function name, return type and parameters (if any)

* Definition function body (code to execute)

// function declaration
void myFunction();
// main method
int main() {
  myFunction(); // --> call the function
  return 0;
}
void myFunction() {// Function definition
  printf("Good evening!");
}
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