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Math                    Description                   Approximate Value 
Properties 
E                       Euler's constant              2.718281828459045091 
LN10                    Natural logarithm of 10       2.302585092994045901 
LN2                     Natural logarithm of 2        0.6931471805599452862 
LOG10E                  Base 10 logarithm of E        0.4342944819032518167 
LOG2E                   Base 2 logarithm of E         1.442695040888963387 
PI                      PI                            3.141592653589793116 
SQRT1_2                 Square root of 1/2            0.7071067811865475727 
SQRT2                   Square root of 2              1.414213562373095145