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

Question

function main() {
placeThreeBalls();
}

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

main();
JavaScript

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Answer 1

The logic error in the provided program is in the placeThreeBalls function, specifically in the loop condition:

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

The loop is set to run while i is less than or equal to 3 (i <= 3). This means that the loop will iterate 4 times (for i = 0, 1, 2, and 3), which results in 4 tennis balls being placed instead of the intended 3.

To fix this, the loop condition should be adjusted to run only 3 times. This can be done by changing the condition to i < 3:

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

With this change, the function will now correctly place exactly 3 tennis balls.