When to Use Integer Division

Use integer division when you need a whole number result and the fractional part doesn't matter. Examples:

$\bullet$ Splitting items into groups: $\lfloor n / k \rfloor$ groups

$\bullet$ Finding the middle index: $\lfloor (\text{left} + \text{right}) / 2 \rfloor$

$\bullet$ Removing digits: $\lfloor n / 10 \rfloor$ removes the last digit

Use regular division when you need precision or are working with measurements, averages, or probabilities.