CPP Character Data Type

💻 CPP Character Data Type (char) – Complete Beginner to Interview Guide

In CPP Character Data Type is used to store a single character, such as letters, digits, or symbols.

1️⃣ What is Character Data Type? ⭐

In C++, the char data type stores one character at a time.

Example

📌 Characters are always written inside single quotes ' '.

2️⃣ Declaring a Character Variable ⭐

Syntax

Example

3️⃣ Character Data Type Example ⭐

Output

4️⃣ Character Input Using cin ⭐

Input

Output

📌 cin reads only one character.

5️⃣ Size of char Data Type ⭐

📌 Size: 1 byte

6️⃣ ASCII Value of Characters ⭐⭐

Each character has an ASCII value.

Output

📌

• 'A' → 65

• 'a' → 97

• '0' → 48

7️⃣ Character Arithmetic ⭐⭐

Output

📌 Character arithmetic works using ASCII values.

8️⃣ char vs string ⭐⭐

Example

9️⃣ Special Character Constants ⭐⭐

📌 These are called escape characters.

🔟 Common Character Errors ❌

❌ Using double quotes "A" instead of 'A'
❌ Storing multiple characters in char
❌ Forgetting ASCII conversion
❌ Confusing char with string

📌 Interview Questions (C++ Character Data Type)

Q1. What is the size of char in C++?
👉 1 byte

Q2. Difference between 'A' and "A"?
👉 'A' is char, "A" is string

Q3. Can char store numbers?
👉 Yes, as characters ('1', '2')

Q4. What is ASCII?
👉 Numeric representation of characters

✅ Summary

✔ char stores single character
✔ Uses single quotes ' '
✔ Size is 1 byte
✔ Characters have ASCII values
✔ Used in input, conditions & logic