print "Square root of 2.7     ="; sqr(2.7)
print "Natural log of 2.7     ="; log(2.7)
print "Exp() of 2.7           ="; exp(2.7)
print "Absolute value of -2.7 ="; abs(-2.7)
print "Floor of 2.7           ="; int(2.7)
print "Floor of -2.7          ="; int(-2.7)
print "2.7 to the 3rd power   ="; 2.7 ^ 3   rem or 2.7 ** 3

comment
  e, pi, and ceiling() are not built-in, but are
  easily implemented
end

function e = real
end = exp(1.0)

function pi = real
end = atn(1.0) * 4.0

function ceil(x = real) = real
end = int(x) + 1

print "e  ="; e
print "pi ="; pi
print "ceiling of 2.7  = "; ceil(2.7)
print "ceiling of -2.7 = "; ceil(-2.7)

end