Question

The following program is supposed to put down three tennis balls. Where is the logic error?

function main() {
placeThreeBalls();
}

function placeThreeBalls() {
for (let i = 0; i <= 3; i++) {
putBall();
}
}

main();
JavaScript


- Line 2


- Line 5


- Line 6


- Line 7

Answer 1

The logic error in the program lies within **Line 6**. The `for` loop is configured to run from `i = 0` to `i <= 3`. Given that the loop condition includes `i <= 3`, it will execute four times (for `i = 0`, `i = 1`, `i = 2`, and `i = 3`).

If the intention is to place exactly three tennis balls, the loop should be structured to iterate three times. Thus, it should change the condition to `i < 3` (or initialize `i` starting from 1 and use `i <= 3` if you wish the loop to be counted starting from 1).

So the corrected line 6 should be either:

```javascript
for (let i = 0; i < 3; i++) {
```

or

```javascript
for (let i = 1; i <= 3; i++) {
```

This would ensure that only three balls are placed instead of four.