The NGrams(s, n) command computes the ordered list of n-grams of the string s. The second argument n must be a 32-bit positive integer no larger than the length of s.

An n-gram of s is a substring of s consisting of exactly n contiguous characters from s.

The empty string  has no n-grams, for any value of n.

Note that NGrams( s, 1 ) is equivalent to .