Count Vowels and Consonants in a String || Python Placement Coding

Published: 23 January 2026
on channel: Blessy Lectures

In this video, we learn how to solve a classic beginner coding problem: How to count the number of Vowels and Consonants in a given string.

This is an excellent exercise for mastering if-else conditions, switch statements, and loop iterations. We will also cover how to handle case sensitivity (e.g., 'A' vs 'a') and how to ignore non-alphabetic characters like numbers and special symbols.

Example:

Input: "Hello World"

Output: Vowels: 3 (e, o, o), Consonants: 7 (H, l, l, W, r, l, d)

🔥 In this tutorial, you will learn: ✅ The Logic: iterating through a string character by character. ✅ Conditionals: Checking if a character is a Vowel (a, e, i, o, u). ✅ The "Else" Trap: Why you can't just use else for consonants (you must check if it's a letter first!). ✅ Handling Case: Converting to lowercase before checking. ✅ Code Implementation in [Python/Java/C++].

📝 The Core Logic:

Initialize vowels = 0 and consonants = 0.

Loop through the string str.

Convert the current character to lowercase to handle 'A' and 'a' easily.

If char is in ['a', 'e', 'i', 'o', 'u'] → increment vowels.

Else If char is between 'a' and 'z' → increment consonants.

Hashtags: #Programming #CodingInterview #StringManipulation #Python #Java #CPP #VowelsAndConsonants #BeginnerCoding #DataStructures #Algorithms

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