Values & arithmetic

Numbers work the way you expect — with one twist that makes them nicer.

Start small

(+ 1 2)

Output:

3

+ is a function, so it goes first. The bonus: it takes any number of arguments.

(* 2 3 4)

Output:

24

Comparisons chain

In most languages you write 1 < 2 && 2 < 3. Here you just list the numbers:

(< 1 2 3)

Output:

true

(< 1 2 3) asks “is this sequence increasing?” — three numbers, one call.

Division that doesn’t lie

Integer division and remainder are separate, honest functions:

(quot 17 5)
(rem 17 5)

Output:

3
2

Put it together: average a shopping list

(def prices [120 45 80])

(reduce + prices)

Output:

245

reduce feeds the vector through + one element at a time — 120 + 45 + 80.

(/ (reduce + prices) (count prices))

Output:

245/3

That 245/3 is a ratio — cljgo keeps the exact fraction instead of silently rounding. Ask for a decimal only when you actually want one:

(double (/ (reduce + prices) (count prices)))

Output:

81.66666666666667

Exactness by default, rounding by choice.