Ratio of any circle\'s circumference to its diameter. Note: this constant is degree unit dependent => rad: 3.14, deg: 180.0 Ratio of any circle\'s circumference to its diameter. Note: this constant is degree unit independent => rad: 3.14, deg: 3.14 Unique real number such that the value of the derivative (slope of the tangent line) of the function f(x) = e^x at the point x = 0 is equal to 1 Imaginary unit, defined such that i^2 = −1 Speed of light in vacuum, m·s^-1 The gravitational constant is an empirical physical constant involved in the calculation of the gravitational attraction between objects with mass, m^3·kg^−1·s^−2 Physical constant reflecting the sizes of energy quanta in quantum mechanics, J·s Reduced Planck constant, J·s Not a number Infinity Built-in My