Python: Count number of non-empty substrings of a given string

Last update on June 12 2025 12:41:28 (UTC/GMT +8 hours)

Count non-empty substrings.

Write a Python program to count the number of non-empty substrings of a given string.

Sample Solution:

Python Code:

# Function to count substrings
def number_of_substrings(str):

  # Get length of string
  str_len = len(str);  

  # Formula to calculate substrings
  return int(str_len * (str_len + 1) / 2);

# Get input string
str1 = input("Input a string: ")

# Print result  
print("Number of substrings:")
print(number_of_substrings(str1)) 

Sample Output:

Input a string:  w3resource
Number of substrings:
55

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to calculate the total number of non-empty substrings in a given string using a mathematical formula.
• Write a Python program to generate all non-empty substrings of a string and return their count.
• Write a Python program to implement a recursive function that counts all possible non-empty substrings of an input string.
• Write a Python program to use combinatorial logic to compute the number of substrings based on the string length.

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