Numbers can be combined using the four basic
arithmetic operations + - * / and
parentheses ( )
Traditional order of operations applies,
with * and / being done before + and -.
Of course, by using parentheses, you can
force any order you like.
write 4 * 4 + 3 * 3 write 4 * (4 + 3) * 3
You can also negate a value by putting a -
before it. (Or leave a value's sign unchanged
by putting a + before it.)
To avoid confusion, a - or
+ that is used for negation should
have a space to its left but not to
its right, and a - or + that is
used for subtraction or addition should
have spaces on both sides:
x = -5 write x - sqrt -x
The ** operator can be used for powers;
x ** y is x raised to the y power:
write 2 ** 3
Powers also be written using pow:
write pow(2, 3)
There are many other math functions.
They include sqrt,
abs, round, ln,
max, and sin.