conditionals and loops

Question

i have a question

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

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

why int total = 0 ?
then how total += number is work?
and please explain how loop like this workin? im really confused to understand this one

thanks..

Answer 1

int total = 0;

we should always initialise variables that are going to be used for caculations so they will never be null/empty when we use them.

total+=number is the same as saying total = total + number

the while loop while(num<=5) repeats the code between its { } brackets until the variable num is equal to or greater than 5.

as you can see each time the loop is run num is incremented by 1 using num++

is this better?

Answer 2

ooo i see what you are asking now. please i will try again.

Answer 3

try:
int num, number, total;
num = 1;
total = 0;

Answer 4

it is same, right?

Answer 5

jay i really appreciate your help, its make me more understand
thank you so much