Random Number Generator

How the Random Number Generator Works

The Random Number Generator creates one or more random values within a custom range using a flexible, easy-to-control interface. You can switch between integers and decimals, set how many results you want, enforce uniqueness (for integers), sort the output, and copy everything with a single click—ideal for practice problems, quick selections, and light simulations.

Inputs: Range, Mode, and Options

You stay fully in control of how numbers are generated:

• Mode:
  • Integers – whole numbers between your min and max.
  • Decimals – real numbers rounded to your chosen decimal places.
• Minimum & maximum: define the numeric range; max must be greater than or equal to min.
• Quantity: how many random values to generate in a single batch.
• Decimal places (decimal mode): how many digits to keep after the decimal point.
• Unique only (integer mode): ensures all results in that batch are distinct; if you request more unique integers than exist in the range, a clear validation error appears.
• Sort results: optional ascending sort; when off, numbers appear in the raw random order.
• Generate and Clear buttons to create new sets or reset the configuration.

How Numbers Are Generated

Under the hood, the generator uses a pseudo-random source and then:

• For integers, scales the random value into the inclusive [min, max] interval so each integer has (approximately) equal chance of being picked.
• For decimals, samples in the continuous range, then rounds to the specified number of decimal places.
• Applies uniqueness checks only where mathematically meaningful (integer mode).
• Applies sorting only after generation so randomness is preserved but easier to read when desired.

Each click on Generate creates a fresh, independent batch; previous results do not influence new ones.

Outputs: Readable Lists & Quick Copy

The results section is optimized for both readability and reuse:

• A short summary line confirms the mode, range, and count used.
• Random values are displayed as a clean list or pill-style items.
• A Copy results button lets you copy all numbers in comma-separated format for spreadsheets, code, or notes.
• If configuration is invalid (e.g. max < min, impossible uniqueness), the generator shows clear instructions instead of partial or misleading output.

Scope, Assumptions & Limitations

For transparency and safety, this Random Number Generator:

• Uses standard pseudo-random number generation suitable for educational and everyday use.
• Is not cryptographically secure and should not be used for passwords, keys, lotteries, or regulated gambling.
• Constrains extreme ranges and counts to keep the UI responsive.
• Treats decimals as independent draws; uniqueness is not enforced for decimal mode due to rounding and continuous sampling.

Practical Use Cases & Educational Insight

Use this Random Number Generator to create practice problems, generate sample data, pick winners in small drawings, simulate dice or lottery-style draws (non-official), or demonstrate random sampling concepts in class. By exposing all inputs, options, and constraints clearly, it helps users see how controlled randomness works—without pretending to be a high-stakes security tool.