Jonathan Ernst
jonathan@ernstfamily.ch 2006
Claude Paroz
claude@2xlibre.net 2006-2009
Laurent Coudeur
laurentc@iol.ie 2009-2010
Alain Lojewski
allomervan@gmail.com 2014
Guillaume Bernard
associations@guillaume-bernard.fr 2015-2021
Irénée Thirion
irenee.thirion@e.email 2023

# Variables and Constants

To assign a value to a variable use the = symbol or choose the variable to assign to with the x button in advanced mode. A variable name must only contain upper or lower case characters, or underscores.

x=5

exemple=82

Variables and constants can be used in any equation and are substituted for their assigned value. Variables and constants can be inserted using the x button.

6x+3

xy−3x+7y−21

Les variables suivantes sont toujours définies.

_ | Résultat du calcul précédent
rand | Une valeur aléatoire comprise entre [0,1] (change à chaque lecture)

The following constants are always defined.

Mathematics
e | Euler’s Number
π | Pi
τ | Tau
φ | Golden Ratio
Electromagnetism
c₀ | Light Speed
е | Elementary Charge
Z₀ | Impedance of Vacuum
μ₀ | Permeability of Vacuum
ε₀ | Permittivity of Vacuum
Atomic & Nuclear
h | Planck’s Constant
α | Fine-Structure Constant
mₑ | Electron Mass
mₚ | Proton Mass
Thermodynamics
k | Boltzmann Constant
mᵤ | Atomic Mass Unit
R | Molar Gas Constant
σ | Stefan-Boltzmann Constant
Nᴀ | Avogadro’s Number
Gravitation
G | Gravitational Constant
g | Earth Acceleration