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Vowel or Consonant in Python

ch in 'aeiou'. lower() first or 'A' looks like a consonant.

BeginnerConditional ProgramsExample 2 of 20
vowel-or-consonant.py
1# Program to check whether a character is a vowel or consonant
2

3ch = input("Enter a single alphabet character: ").lower()
4

5if len(ch) != 1 or not ch.isalpha():
6    print("Please enter exactly one alphabetic character.")
7else:
8    if ch in 'aeiou':
9        print(ch, "is a vowel")
10    else:
11        print(ch, "is a consonant")

Output

Enter a single alphabet character: a
a is a vowel

In this one

  • lower() before the vowel check
  • Y is a consonant in this program. Live with it.

What's going on

ch in 'aeiou'. That's the vowel test. 'A' is not in that string, so .lower() first or every capital is a consonant.

isalpha() plus len == 1 because "ae" and "3" are not the question you asked.

Y is a consonant here. Linguists can fight it in the comments.

After this program

If the idea is still fuzzy, read Day 8: Conditional Statements in the Python course. For a short check, try the Python quiz (300 questions). Stay with all 20 conditional programs, or see every topic on Python exercises.

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