PDF version - Computing Help - University of Cambridge

1A C++ courseworkhttp://www-h.eng.cam.ac.uk/help/tpl/languages/C++/...need 1 number as input (like the square root function) or several, or none. Notethat in C++, functions are said to "return" their output back to the thing that asked for them. They can return one thing or nothing.Execution of the function code ends when a return statement is reached, or when the function code ends.The first line of the function is compact and contains a lot of information.int - this is saying that the function is going to calculate an integer value rather than (say) a string.timesBy7 - this is the name of the function(int number) - this is saying that timesBy7 needs to be given an integer as input, and inside this function the integer is going tobe known as number. Some functions don't need any inputs. Other functions might need many inputs. This function needs exactlyone integer.Here's a little program that uses this function to display some multiples of 7. Though short, it illustrates what you need to do whenwriting your own functions. From now on, just about all your programs in every computing language you learn will use functions, sostudy this example carefully#include #include using namespace std;// This function multiples the given number by 7int timesBy7(int number) {return number*7;}int main() {int num=1;while (num