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Count words in a sentence in Python program
In this article, we will learn about the solution to the problem statement given below.
Problem statement − We are given a string we need to count the number of words in the string
Approach 1 − Using split() function
The split() function breaks the string into a list iterable with space as a delimiter. if the split() function is used without specifying the delimiter space is allocated as a default delimiter.
Example
test_string = "Tutorials point is a learning platform" #original string print ("The original string is : " + test_string) # using split() function res = len(test_string.split()) # total no of words print ("The number of words in string are : " + str(res))
Output
The original string is : Tutorials point is a learning platform The number of words in string are : 6
Approach 2 − Using regex module
Here findall() function is used to count the number of words in the sentence available in a regex module.
Example
import re test_string = "Tutorials point is a learning platform" # original string print ("The original string is : " + test_string) # using regex (findall()) function res = len(re.findall(r'\w+', test_string)) # total no of words print ("The number of words in string are : " + str(res))
Output
The original string is: Tutorials point is a learning platform The number of words in string is: 6
Approach 3 − Using sum()+ strip()+ split() function
Here, we first check all the words in the given sentence and add them using the sum() function.
Example
import string test_string = "Tutorials point is a learning platform" # printing original string print ("The original string is: " + test_string) # using sum() + strip() + split() function res = sum([i.strip(string.punctuation).isalpha() for i in test_string.split()]) # no of words print ("The number of words in string are : " + str(res))
Output
The original string is : Tutorials point is a learning platform The number of words in string are : 6
All the variables are declared in the local scope (Also Read: Local and Global Variables) and their references are seen in the figure above.
Conclusion
In this article, we have learned how to count the number of words in the sentence.
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