The signs

Times happens before plus, just like in school. Use parentheses when you want to be the boss:

oga 2 + 3 * 4        ugg 14
oga (2 + 3) * 4      ugg 20

Dividing by zero does not crash -- it gives a friendly error:

OOGA! Cannot share by zero!
Hint: check the number is not 0 before dividing.

Whole numbers stay whole when they can:

oga 4 / 2      ugg 2 (not 2.0 -- CMC keeps it tidy)
oga 5 / 2      ugg 2.5

The math helpers

oga round(2.5)     ugg 3
oga flat(2.9)      ugg 2    (always down)
oga roof(2.1)      ugg 3    (always up)
oga abs(0 - 7)     ugg 7    (how far from zero)
oga small(3, 9)    ugg 3
oga big(3, 9)      ugg 9
oga root(81)       ugg 9
oga root(2)        ugg 1.4142135623730951
oga pow(2, 5)      ugg 32
oga pi             ugg 3.141592653589793

root of a negative number is an error with a hint to use abs first.

Random magic: munga

munga(low, high) gives a random whole number, and both ends are possible:

grunk dice = munga(1, 6)
oga "You rolled a", dice

grunk coin = munga(0, 1)
binga coin == 0
    oga "heads"
wonga
    oga "tails"
unga

Picking a random thing from a pile:

grunk snacks = snorf("berry", "fish", "mystery meat")
grunk pick = snacks[munga(0, nom(snacks) - 1)]
oga "tonight we eat:", pick

munga(1, 1) is always 1. That is handy for testing: your program is random everywhere except where you say otherwise.

Text to number

blorp answers are text, so use numba before doing math:

grunk answer = blorp "How many rocks?"
grunk count = numba(answer)
oga count * 2, "is twice that many"

If the answer was not a number, numba says:

OOGA! numba cannot turn "banana" into a number.
Hint: answers that are numbers look like "42" or "3.5".

Number to text

Use goop when gluing a number into text:

oga "half of 9 is " + goop(9 / 2)

A tiny calculator

clump calc(a, op, b)
    binga op == "+"
        ork a + b
    wonga binga op == "-"
        ork a - b
    wonga binga op == "*"
        ork a * b
    wonga binga op == "/"
        ork a / b
    wonga
        ork plop
    unga
unga

oga calc(6, "*", 7)      ugg 42

Next: Asking questions.