While loop

Question

What is 'total += number'?

Answer 1

// https://www.sololearn.com/learn/JavaScript/1131/?ref=app

Answer 2

i = i + 1; OR i += 1;

Suppose you had an int variable, sum,
and you wanted to add 10 to it.

How would you do this?

Here's one solution: sum = sum + 10;

This kind of operation is very common (where 10 is replaced by whatever value you want).
//OR
You can use the compound addition assignment operator, which looks like:
+= (plus sign, followed by equal sign).

sum += 10; // Add 10 to sum

Suppose, instead of adding a value to sum, you wanted to double it? That is, you wanted to multiply it by 2?

One way to do this is :
sum = sum * 2; // Multiply sum by 2

//OR
sum *= 2; // Multiply sum by 2

Answer 3

I think its correct