Number Generator

A precise number generator tool for testers, developers, and educators to obtain random values within a defined range quickly and reproducibly.

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About This Tool

The Number Generator tool produces random values within a user-defined range. It supports reproducibility through an optional seed and offers multiple sampling strategies. It is designed for testers, developers, and data scientists who need deterministic data or quick value generation for simulations and QA datasets. It supports both integer and decimal outputs. It enables repeatable experiments and rapid data seeding for pipelines. Its compact logic makes it suitable for automation and integration into test frameworks. Example: min=0, max=100, count=5 with seed=42 yields the same five numbers on every run when the seed is applied.

Inputs include: min, max, count, decimals, distribution, and seed. Validation enforces min <= max, count >= 1, decimals in 0-6. If seed is provided, results are reproducible; otherwise outcomes vary. For uniform distribution, values are drawn from a standard RNG scaled to [min, max]. For normal distribution, values are drawn from a Gaussian and truncated to the defined range.

Outputs are a list of numbers formatted per the decimals setting. Each value is presented with fixed decimals when requested or as integers otherwise. The tool can return a single value when count=1 or an array for multiple samples, enabling downstream data shaping.

Unique value propositions include deterministic seeding, selectable distribution types, clear validation rules, and a compact implementation suitable for automation. Typical use cases: seed test databases, drive Monte Carlo experiments, generate input fuzz data, or create repeatable demo datasets.

How to Use

  1. Provide inputs: min, max, count, decimals, distribution, and optional seed.
  2. Validate ranges and distribution parameters locally in the tool logic.
  3. Run generation to produce the result set.
  4. Review outputs and adjust precision or count as needed.
  5. Export results if integrating into a pipeline.
How to use generator liczby

Frequently Asked Questions

Find Quick Answers

Which distributions are supported?
The tool supports uniform and normal distributions. Uniform samples cover the full [min, max] interval with equal probability, while normal samples cluster around the center with controlled truncation to the defined range.
Is the output reproducible?
Yes. When a seed is provided together with the same min, max, distribution, decimals, and count, the generated sequence will be identical across runs. Without a seed, each run yields a different sequence due to RNG state initialization.
What happens if min equals max?
If min equals max, all generated values equal that endpoint. In uniform mode the RNG is effectively bypassed and every sample returns the same value; in normal mode the distribution still returns the same constant due to zero range.
What formats can be exported?
Exports can be produced in CSV or JSON formats for integration into data pipelines or test datasets; you can control decimal precision, include headers, and choose whether to wrap numbers in an array or a flat list.

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