return example C

// define a new function named "addThree" which takes an int argument
int addThree(int input)
{
    // return the result of the expression "input+3"
    return input+3;
}

// define the standard entrypoint for a C program, "main()"
int main()
{
    // initialize variable n
    int n = 0;

    // call addThree the parameter literal integer "2"
    // store the returned value in n
    n = addThree(2);

    // add 5 to n and store the result in n
    n = n + 5;

    // exit program by returning from main
    // 0 is the standard "OK" program exit code
    return 0;
}