Answered

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What will be the value of `sum1` after this code runs?

```javascript
var START = 1;
var END = 4;
function start(){
var sum1 = 0;
for(var i = START; i <= END; i++){
sum1 += i;
}
}
```

A. 4
B. 1
C. 40
D. 10

Sagot :

GinnyAnswer
Let's break down this problem step-by-step:

1. We start by initializing `START` to 1 and `END` to 4.
2. We define a function `start` which initializes the variable `sum1` to 0.
3. We then use a `for` loop that starts at `i = START` and runs while `i <= END`, meaning the loop will run from `i = 1` to `i = 4`.

Here’s a breakdown of each iteration of the loop and the value of `sum1`:

- First Iteration:
- `i = 1`
- `sum1 = 0 + 1 = 1`

- Second Iteration:
- `i = 2`
- `sum1 = 1 + 2 = 3`

- Third Iteration:
- `i = 3`
- `sum1 = 3 + 3 = 6`

- Fourth Iteration:
- `i = 4`
- `sum1 = 6 + 4 = 10`

After the final iteration, the value of `sum1` is 10. Thus, the correct answer is:

D. 10
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