Functions are created using the function keyword.  The example below creates a simple function which prints a friendly message.  The function must conclude with the "end" statement.

The function below takes no arguments as input:

function foo()  // declare the function

  print("hello")

  end

 

foo() // call the function

hello

The function below takes three arguments as input and returns a value:

function Addition (a,b,c)   // the three arguments are input to the function

d = a+b+c

return (d)

end

 

t = Addition(2,3,4)

print("t is",t)

 

> t is    9

The function below takes variable number arguments as input and returns a value:

function Addition (...)   // the three dots constitute variable number of arguments

  num = arg.n     //number of arguments passed to the function

  i = 1;

  d = 0;

while (i <= num) {

d = arg[i]+d;

i = i+1;

}

return (d)

end

 

t = Addition(2,3,3)

print(t)

 

>t is    8

 

> print(foo) // get the value of the variable "foo"

function: 0566AA28

A random number is generated above.

For more information on HyperMath function types, see Defining Functions.