The primary use of a thermometer is to measure temperature. Thermometers are essential tools in various fields, including medicine, meteorology, and cooking, allowing individuals to gauge the heat level of the environment, bodily temperature, or food. In a medical context, measuring body temperature helps identify fevers or other health conditions. In cooking, thermometers ensure that food reaches safe temperatures for consumption, preventing foodborne illness. With advancements in technology, thermometers have evolved into digital formats, providing faster and more accurate readings, thereby enhancing their practicality across different applications.