Type of Functions
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When creating a function, the data type of the return value must always be specified. In the main function, the return type is declared as int, indicating that it will return an integer value upon completion. In most cases, the main function returns 0 to signify that the program has successfully executed.
main.cpp
1234int main() { return 0; }
The main function is reserved in C++ and it always returns an integer. You can omit the return statement only in the main function, as the compiler automatically adds return 0; at the end.
Custom functions can return any value, but it's essential to understand that the type of the return value must match the specified return type in the function definition.
custom_function.h
123456// Define a function with a specific return type and name ___ custom_function() { // Return a value that matches the function's return type return ___; }
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