The constant are in Mathématiques and more generally in numbers of sciences of the values which do not change. One opposes them to the Variable S whose value can change. One often notes them by a small letter.

These values are used in Physique to determine calculations. Example the Gravitation, the Speed of light in the vacuum, the Constant of Planck, the Constant of Faraday, loads and masses of the electron, the Number of Avogadro, the magneton of Niels Bohr…

See too

• Table of constant mathematics
• Constant physics
• Coupling in theory of the cords
• Table of the astrophysical constants

Zh-min-nan: Tiāⁿ-sò͘ Simple: Constant