HP Prime Graphing Calculator - Manual (Page 396)

390 Functions and commands
evalc Returns a complex expression written in the form
real+i*imag.
evalc(Expr)
Example:
evalc
returns
evalf Given an expression and a number of significant digits,
returns the numerical evaluation of the expression to the given
number of significant digits. With just an expression, returns
the numerical evaluation based on the CAS settings.
evalf(Expr,[Integer])
Example:
evalf(2/3)
gives
0.666666666667
even Tests whether or not an integer is even. Returns 1 if it is and 0
if it is not.
Example:
even(1251) returns 0
exact Converts a decimal expression to a rational or real
expression.
exact(Expr)
Example:
exact(1.4141)
gives
14141/10000
EXP Returns the solution to the mathematical constant e to the
power of an expression.
exp(Expr)
Example:
exp(0)
gives
1
1
x y i  +
------------------
 
  x
x
2
y
2
+
-------------------
i y 
x
2
y
2
+
------------------- –