Write a Python program to count the number of vowels in a given string.

Question

Aryan Kumar · Answer

Sure, here is a Python program to count the number of vowels in a given string:

Python

def count_vowels(string):
  """
  Counts the number of vowels in a given string.

  Args:
    string: The string to count the vowels in.

  Returns:
    The number of vowels in the string.
  """

  vowels = "aeiou"
  vowel_count = 0
  for character in string:
    if character in vowels:
      vowel_count += 1

  return vowel_count


if __name__ == "__main__":
  string = "hello world"
  vowel_count = count_vowels(string)
  print(vowel_count)

This program works by first defining a set of vowels. Then, the program iterates through the characters in the string and checks if the character is a vowel. If the character is a vowel, then the program increments the vowel_count variable. Finally, the program returns the vowel_count variable.

To run the program, you can save it as a Python file and then run it from the command line. For example, if you save the program as count_vowels.py, you can run it by typing the following command into the command line:

Code snippet

python count_vowels.py

This will print the number of vowels in the string to the console.

Here is an example of the output of the program:

Code snippet

$ python count_vowels.py
3

As you can see, the output of the program is 3, which is the number of vowels in the string "hello world".

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Write a Python program to count the number of vowels in a given string.

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