While loops

Question

#include <iostream>
using namespace std;

int main()
{
int num = 1;
int number;
int total = 0;

while (num <= 5) {
cin >> number;
total += number;
num++;
}
cout << total << endl;

return 0;
}
I can't seem to wrap my head around this one
Can someone try and explain it to me simple terms ?
Thanks
Harry

Answer 1

difficult to explain without knowing what exactly you dont understand, so i will explain all of it

actions inside the while loop will be repeating as long as loop condition is true. In this case, variable "num" must be lower or equal to 5 (num <= 5). Loop condition is checked on entering the loop, and at the end of the loop. Condition met - loop repeats. Not met - code ahead of loop executes

this exact loop on each itteration runthrough asks user to input a number and saves it to variable "number" (cin>>number). It then adds this number to the "total" variable (total += number), and adds 1 to the "num" (num++)

this will repeat 5 times, at which point "num" will become 6, and the program will execute "cout<<total<<endl", displaying the value of the variable "total"

Answer 2

If compiled on pc, on "cin>>number" program would stop and wait for input, but since in sololearn you can only enter input before running the program, if you only entered, for example, 10, it will use 10 in all of the imput requests

if you enter 10, then this 10 will be added to "total" 5 times, resulting in "total" being 50