🎲 Random Integer

Sometimes you just need a random whole number between two bounds - a step count to sweep, a batch size, an index into a list, a value to jitter some parameter shot to shot. Random Integer does exactly that: pick a min and a max, and it hands you a random INT in that range. Small node, does one thing, no surprises.

The one nice extra: it also gives you a string version of the same number. That sounds trivial until you're trying to inject the value into a prompt or a filename, where you need text, not an int. Having both come out of one node saves you a converter.

How it works

On each run it draws a random integer between min_value and max_value (inclusive of the range you set) and outputs it two ways - as an INT for wiring into numeric widgets, and as a STRING for anywhere text is expected. Randomness is driven by the seed, which behaves like every other seed in ComfyUI: set its control to "randomize" and you get a fresh number every queue; fix it and you get the same number every time, which is exactly what you want when you're trying to reproduce a result.

The inputs and outputs that matter

• min_value (INT, default 1) - the low bound.
• max_value (INT, default 10) - the high bound.
• seed (INT) - controls the draw. Randomize it for variety, pin it for reproducibility. This is the one people forget: if your "random" number never changes, your seed control is set to fixed.

Two outputs:

• INT - the number, for numeric inputs (steps, batch counts, indices).
• STRING - the same number as text, for prompts, filenames, or labels.

How to install it

ComfyUI Manager: search Bjornulf_custom_nodes, install, restart. Manual:

cd ComfyUI/custom_nodes
git clone https://github.com/justUmen/Bjornulf_custom_nodes
pip install -r Bjornulf_custom_nodes/requirements.txt

then restart. No dependency of note - it's arithmetic, so it always loads.

Common issues & troubleshooting

The number never changes between runs. Your seed control is on "fixed." Set it to "randomize" (the control-after-generate dropdown under the seed) and you'll get a new value each queue. This is the single most common confusion with every seeded node, not just this one.

I want a new number within one run / per loop iteration. A single node evaluates once per graph execution, so it produces one number per run, not one per loop step. If you need per-iteration randomness, that's a different pattern - drive the randomness from inside the loop, or reach for one of the pack's loop-oriented nodes.

I need a decimal, not a whole number. Wrong node - use the pack's Random Float, which does the same thing for floating-point values (and likewise gives you a text copy).

The range feels off by one. Set min_value and max_value to the exact inclusive bounds you want. If you need "0 to 9," say 0 and 9, not 0 and 10.

Feeding the INT into a widget didn't take. Some KSampler widgets have to be converted to inputs first - right-click the target node and convert the widget (e.g. steps) to an input before you can wire a number into it.