Loop

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;
}

Please who can explain this code

Answer 1

The loop executes 5x (1 - 5).

1 <= 5 true -> execute loop
get user input //e.g. 1
total += number //total = 0 + 1 = 1
increment num //2

2 <= 5 true
user input //e.g. 2
total += number //total = 1 + 2 = 3
num++ //3

3 <= 5 true
user input //e.g. 3
total += number //total = 3 + 3 = 6
num++ //4

4 <= 5 true
user input //e.g. 4
total += number //total = 6 + 4 = 10
num++ //5

5 <= 5 true
user input //e.g. 5
total += number //total = 10 + 5 = 15
num++ //6

6 <= 5 false -> end loop
print total -> output 15

On sololearn you have to enter all values at the beginning (enter 5 values).