Gerador Aleatório — Calculadora Online Grátis
Generate random integers or decimals with custom range and count
The Advanced Random Number Generator produces one or more random integers or decimal numbers within any range you specify. It supports generating multiple numbers at once (with optional uniqueness requirement) and outputs results in a copy-ready format. Teachers creating randomized problems, statisticians sampling data, and game developers seeding procedural content all use this type of tool regularly.
Frequently Asked Questions
Sobre Esta Calculadora
Random number generation serves two broad purposes: simulation and sampling. When running probability experiments or Monte Carlo simulations, you need values that are genuinely unpredictable and uniformly distributed across the range. When sampling from a population for surveys or experiments, unique random selections ensure every element has an equal chance of being chosen.
This generator uses cryptographically secure randomness (the browser's crypto API) rather than a simple mathematical pseudo-random sequence. This matters when the unpredictability of the output is important, such as in game design, statistical sampling, or teaching probability.
The unique mode (no repeats) is implemented using sampling without replacement — equivalent to shuffling a deck and drawing from the top. The decimal mode allows specifying precision. Results are displayed in a format that can be copied directly into spreadsheets or code.
Produza senhas sem complicação.
Exemplo Resolvido
Generating 5 unique random integers between 1 and 49 (lottery simulation)
Entradas:
- Minimum: 1
- Maximum: 49
- Count: 5
- Type: Unique integers
Passo a Passo:
- Pool of possible values: 1 to 49 (49 integers)
- Use Fisher-Yates shuffle (or crypto-random selection without replacement)
- Draw 1st: 23 (removed from pool)
- Draw 2nd: 7 (removed from pool)
- Draw 3rd: 41 (removed from pool)
- Draw 4th: 15 (removed from pool)
- Draw 5th: 38 (removed from pool)