func main():
	>> 2 + 3
	= 5

	>> 2 * 3
	= 6

	>> 2 + 3 * 4
	= 14

	>> 2 * 3 + 4
	= 10

	>> Int8(1) + Int16(2)
	= 3 : Int16

	>> 1 << 10
	= 1024

	!! Signed and unsigned bit shifting:
	>> Int64(-2) << 1
	= -4 : Int64
	>> Int64(-2) <<< 1
	= -4 : Int64
	>> Int64(-2) >> 1
	= -1 : Int64
	>> Int64(-2) >>> 1
	= 9223372036854775807 : Int64

	>> 3 and 2
	= 2

	>> 3 or 4
	= 7

	>> 3 xor 2
	= 1

	nums := ""
	for x in 5:
		nums ++= "$x,"
	>> nums
	= "1,2,3,4,5,"

	>> x := Int64(123)
	>> x:format(digits=5)
	= "00123"
	>> x:hex()
	= "0x7B"
	>> x:octal()
	= "0o173"

	>> Int64.min
	= -9223372036854775808
	>> Int64.max
	= 9223372036854775807


	>> Int32(123):hex()
	= "0x7B"
	>> Int16(123):hex()
	= "0x7B"
	>> Int8(123):hex()
	= "0x7B"

	>> Int(2.1)
	= 2 : Int

	do:
		>> small_int := 1
		= 1
		>> max_small_int := 536870911
		= 536870911
		>> max_i64 := 536870912
		= 536870912
		>> super_big := 9999999999999999999999
		= 9999999999999999999999
		>> max_small_int + 1
		= 536870912

		>> max_small_int + max_small_int
		= 1073741822

		>> super_big + 1
		= 10000000000000000000000

	do:
		for in 20:
			>> n := random:int(-999999, 999999)
			>> d := random:int(-999, 999)
			!! n=$n, d=$d:
			>> (n/d)*d + (n mod d) == n
			= yes

	>> 0:next_prime()
	= 2
	>> 7:next_prime()
	= 11
	>> 11:prev_prime()
	= 7
	>> (and: p:is_prime() for p in [
		2, 3, 5, 7,
		137372146048179869781170214707,
		811418847921670560768224995279,
		292590241572454328697048860273,
		754893741683930091960170890717,
		319651808258437169510475301537,
		323890224935694708770556249787,
		507626552342376235511933571091,
		548605069630614185274710840981,
		121475876690852432982324195553,
		771958616175795150904761471637,
	])!
	= yes

	>> (or: p:is_prime() for p in [
		-1, 0, 1, 4, 6,
		137372146048179869781170214707*2,
		811418847921670560768224995279*3,
		292590241572454328697048860273*754893741683930091960170890717,
	])!
	= no

	>> Int(yes)
	= 1
	>> Int(no)
	= 0

	>> Int64(yes)
	= 1 : Int64
	>> Int64(no)
	= 0 : Int64

	>> 4:choose(2)
	= 6

	>> 4:factorial()
	= 24