What is the advantage of vernier caliper over a regular scale graduated in millimeter?

The advantage of a vernier caliper over a regular scale graduated in millimeters is its ability to provide more precise measurements, typically to within 0.01 mm. This increased accuracy is achieved through the use of a sliding scale that allows for finer adjustments and readings. Additionally, vernier calipers can measure internal and external dimensions as well as depths, making them more versatile for various applications compared to a standard ruler.