Defines a single numerical constant. This may be an integer constant, a floating point constant or an expression that evaluates to a constant. The following operators and functions are available in expressions:
a + b addition
a - b subtraction
a * b multiplication
a / b division
( a ) Grouping expressions.
This is often needed in more complex expressions to get the correct evaluation
precedence.
(- a) Unary minus
srqt (a) square root
sin(a) sine
cos(a) cosine
tan(a) tangens
acos(a) arcus sine
asin(a) arcus cosine
atan(a) arcus tangens
sinh(a) sine hyperbolicus
cosh(a) cosine hyperbolicus
tanh(a) tangens hyperbolicus
exp(a) exponential function
log(a) logarithm to base e
log10(a) logarithm to base 10