Muhammad Aftab Liaqat on Instagram: "💻 Step-by-Step: Sum of Digits in C++ 1️⃣ Input a number: The function takes an integer (e.g., 1234). 2️⃣ Convert to string: We turn the number into a string using to_string(), so each digit can be accessed individually. 3️⃣ Loop through each digit: Using a for loop, we check every character in the string one by one. 4️⃣ Convert char to int: Each character '0'..'9' is converted to its actual number by subtracting '0'. Example: '5' - '0' = 5 ✅ 5️⃣ Add to sum: