function

crypto.randomInt

max: number

): number;

Return a random integer n such that min <= n < max. This implementation avoids modulo bias.

The range (max - min) must be less than 2**48. min and max must be safe integers.

If the callback function is not provided, the random integer is generated synchronously.

// Asynchronous
const {
  randomInt,
} = await import('node:crypto');

randomInt(3, (err, n) => {
  if (err) throw err;
  console.log(`Random number chosen from (0, 1, 2): ${n}`);
});

// Synchronous
const {
  randomInt,
} = await import('node:crypto');

const n = randomInt(3);
console.log(`Random number chosen from (0, 1, 2): ${n}`);

// With `min` argument
const {
  randomInt,
} = await import('node:crypto');

const n = randomInt(1, 7);
console.log(`The dice rolled: ${n}`);

@param max

End of random range (exclusive).

function randomInt(

min: number,

max: number

): number;

Return a random integer n such that min <= n < max. This implementation avoids modulo bias.

The range (max - min) must be less than 2**48. min and max must be safe integers.

If the callback function is not provided, the random integer is generated synchronously.

// Asynchronous
const {
  randomInt,
} = await import('node:crypto');

randomInt(3, (err, n) => {
  if (err) throw err;
  console.log(`Random number chosen from (0, 1, 2): ${n}`);
});

// Synchronous
const {
  randomInt,
} = await import('node:crypto');

const n = randomInt(3);
console.log(`Random number chosen from (0, 1, 2): ${n}`);

// With `min` argument
const {
  randomInt,
} = await import('node:crypto');

const n = randomInt(1, 7);
console.log(`The dice rolled: ${n}`);

@param min

Start of random range (inclusive).

@param max

End of random range (exclusive).

function randomInt(

max: number,

callback: (err: null | Error, value: number) => void

): void;

Return a random integer n such that min <= n < max. This implementation avoids modulo bias.

The range (max - min) must be less than 2**48. min and max must be safe integers.

If the callback function is not provided, the random integer is generated synchronously.

// Asynchronous
const {
  randomInt,
} = await import('node:crypto');

randomInt(3, (err, n) => {
  if (err) throw err;
  console.log(`Random number chosen from (0, 1, 2): ${n}`);
});

// Synchronous
const {
  randomInt,
} = await import('node:crypto');

const n = randomInt(3);
console.log(`Random number chosen from (0, 1, 2): ${n}`);

// With `min` argument
const {
  randomInt,
} = await import('node:crypto');

const n = randomInt(1, 7);
console.log(`The dice rolled: ${n}`);

@param max

End of random range (exclusive).

@param callback

function(err, n) {}.

function randomInt(

min: number,

max: number,

callback: (err: null | Error, value: number) => void

): void;

Return a random integer n such that min <= n < max. This implementation avoids modulo bias.

The range (max - min) must be less than 2**48. min and max must be safe integers.

If the callback function is not provided, the random integer is generated synchronously.

// Asynchronous
const {
  randomInt,
} = await import('node:crypto');

randomInt(3, (err, n) => {
  if (err) throw err;
  console.log(`Random number chosen from (0, 1, 2): ${n}`);
});

// Synchronous
const {
  randomInt,
} = await import('node:crypto');

const n = randomInt(3);
console.log(`Random number chosen from (0, 1, 2): ${n}`);

// With `min` argument
const {
  randomInt,
} = await import('node:crypto');

const n = randomInt(1, 7);
console.log(`The dice rolled: ${n}`);

@param min

Start of random range (inclusive).

@param max

End of random range (exclusive).

@param callback

function(err, n) {}.