How do you determine the start and end boundaries when using a `for` loop?

When using a for loop, the initial and final boundaries define the starting value of the iteration and the condition under which it ends.

For example, if you need to iterate over all elements of an array:

• The initial boundary is usually 0 (the index of the first element).
• The final boundary is the length of the array minus 1, but in the loop condition, it is usually set to < array length to avoid going out of bounds.

Example in JavaScript:

const arr = [10, 20, 30];
for (let i = 0; i < arr.length; i++) {
  console.log(arr[i]);
}

Here, i starts at 0 and increases until i is less than the array length, which guarantees traversing all elements without going out of bounds.