Calculator Guide

Random & IDs

Generate random values — a number in a range, a unique identifier, a coin flip, or a random choice. Function names are case-insensitive.

random(1, 6)
random(10, 100)
uuid()
nanoid()

Functions

Function	Description	Example
`random()`	A real number in `[0, 1)`	`random()`
`random(max)`	A whole number from `0` to `max` (inclusive)	`random(6)`
`random(min, max)`	A whole number from `min` to `max` (inclusive)	`random(10, 100)`
`uuid()`	A UUID — version 7 (time-ordered) by default	`uuid()`
`uuid(4)` / `uuid(7)`	A specific UUID version (v4 random, v7 ordered)	`uuid(4)`
`nanoid()`	A 21-char URL-safe id; `nanoid(n)` sets length	`nanoid()`
`coin()`	`"heads"` or `"tails"`	`coin()`
`randombool()`	`true` or `false`	`randombool()`
`pick(...)`	One argument chosen at random	`pick(1, 2, 3)`
`randomcolor()`	A random colour (shown as a swatch)	`randomcolor()`

random returns a plain number, so it composes with the rest of an expression. uuid(), nanoid(), coin(), and a text pick(...) return text.

random(1, 6)
5 + random(1, 6)
random(100) %
random(1, 2^4)
pick("rock", "paper", "scissors")

Non-integer bounds give a real number in [min, max):

random(0, 1.5)
random(2.5, 7.5)

Stable values (managed seed)

The editor re-evaluates every line as you type, so a bare random() would produce a new value on every keystroke. To prevent that, the app freezes the value the first time the line evaluates: it attaches a hidden seed to the call.

The call still reads as random(10, 100) — the seed isn't shown.
The seed lives in the saved text, so the value stays the same across edits, reloads, and copy/paste.
Hover the function name to reveal the seed and re-roll for a new value.
You never manage the seed yourself.

Outside the app (the CLI or one-shot evaluation), these functions draw a fresh value on every run — numbers from the system RNG, and nanoid() / unseeded uuid() from a cryptographically secure source.

Common mistakes

random(min, max) returns a whole number when both bounds are integers. Pass a non-integer bound (e.g. random(0, 1.0) → use random(0, 1.5)) for a real number in the range.
A uuid(), nanoid(), coin(), or text pick(...) result is text, not a number, so it cannot be used in further arithmetic in the same expression.