I can't understand that how it is giving me output 20

Answer 1

may be it is taking some garbage value as you need to input 5 numbers

Answer 2

IF YOU ENTER 4, 5 TIMES

While is a loop, that means it repeats some code until a condition is satisfied.

Here, your condition is num<=5,

For 1st iteration, num = 1,you input 4, which means number = 4. And total = total + number, which means, total = 0 + 4 = 4. Also num is incremented to 2.

For 3nd iteration, num = 2,total = total(which is 4) + number(which is 4) = 8. And num is incremented to 3.

next, num = 3, total = 8 + 4, num = 4.

Next, num = 4, total = 12 + 4, num = 5

Finally, num = 5, total = 16 + 4 = 20, num = 6.
Now this num is not <=5, so loop breaks and prints total, which is 20.

Answer 3

int num = 1;
int number;
int total = 0;

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

Answer 4

and I have enter no. 4 when it ask to put a no.

Answer 5

Code?

Answer 6

thanks