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Bigram, Trigram, And Ngram In NLP

This article describes the bigram, trigram, and ngram in NLP.

What Is A Bigram?

A bigram is a sequence of two consecutive words in a text. Consider the following code: -

from nltk import bigrams

sentence = ["I", "love", "NLP"]
bi_grams = list(bigrams(sentence))
print(bi_grams)

The output of the above code is: -

Picture showing the output of bigram in nlp

What Is A Trigram?

A trigram is a sequence of three consecutive words in a text. Consider the following code: -

from nltk import trigrams

sentence = ["I", "love", "natural", "language", "processing"]
tri_grams = list(trigrams(sentence))
print(tri_grams)

The output of the above code is: -

Picture showing the output of trigram in nlp

N-Gram

An n-gram is a contiguous sequence of n items. If n=1, then it is called a unigram, n=2 bigram, and n=3 trigram. Consider the following code: -

from nltk import ngrams

sentence = ["I", "love", "natural", "language", "processing"]
n = 4  # Change n to generate different n-grams
n_grams = list(ngrams(sentence, n))
print(n_grams)

The output of the above code is: -

Picture showing the output of n-gram in nlp

Posted By -	Karan Gupta

Posted On -	Wednesday, August 20, 2025

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