Function formatUsageQty

internal/estimate/estimator.go:775–790

formatUsageQty formats a usage quantity for display (e.g. 1000000 → "1,000,000").

(qty float64)

// formatUsageQty formats a usage quantity for display (e.g. 1000000 → "1,000,000").
func formatUsageQty(qty float64) string {
	s := strconv.FormatFloat(qty, 'f', 0, 64)
	// Insert thousand separators.
	n := len(s)
	if n <= 3 {
		return s
	}
	var out []byte
	for i, c := range s {
		if i > 0 && (n-i)%3 == 0 {
			out = append(out, ',')
		}
		out = append(out, byte(c))
	}
	return string(out)
}