natural

// usage
chance.natural()
chance.natural({ min: 1, max: 20 })

Return a natural number.

range: 0 to 9007199254740991

  chance.natural();
  => 125019392395

Can optionally provide min and max.

chance.natural({min: 1, max: 20});
=> 14

Can optionally provide numbers you wish to exclude.

chance.natural({min: 1, max: 5, exclude: [1, 3]});
=> 2

These are inclusive, so they are included in the range. This means chance.natural({min: 1, max: 3}); would return either 1, 2, or 3 or:

// Specific case
1 <= random number <= 3

// General case
min <= random number <= max

Natural Number on Wikipedia