1️⃣ What Is a Pointer? A pointer is a special type of variable that stores the memory address of another variable. 🔑 In simple words: ✏️ Analogy: Think of your house as a variable and its address as a pointer. You can tell someone the address (pointer), and they can find your house (the value). […]

1️⃣ What Is an Array? An array is a collection of variables of the same type, stored contiguously in memory. Instead of creating individual variables like: You can use an array: ✔️ Arrays make it easy to handle multiple values with a single name. 2️⃣ Why Use Arrays? 3️⃣ Declaring an Array Syntax: Example: 4️⃣ […]

1️⃣ What Are Conditionals? Conditionals let your program make decisions.You can tell the program: 👉 “If this condition is true, do something. Otherwise, do something else.” 2️⃣ The if Statement Syntax: 🛠 Example: 3️⃣ The if-else Statement Use else when you want to do something different if the condition is false. Syntax: 🛠 Example: 4️⃣ […]

1️⃣ What Is a Loop? A loop lets your program repeat a block of code multiple times. 💡 For example:👉 Print numbers 1 to 5👉 Keep asking the user for input until they enter 0 Without loops, you’d have to write the same code over and over. 2️⃣ Types of Loops in C Loop Type […]

1️⃣ Why Dynamic Memory? In C, when you declare an array or variable, its size must be known at compile time: But what if: 👉 Dynamic memory allocation solves this problem. 2️⃣ Key Functions Function What It Does malloc Allocates a block of memory (uninitialized). calloc Allocates and also initializes the block to zero. free […]

1️⃣ What Is a struct? A struct (structure) in C is a user-defined data type that allows you to group different types of variables under one name. 👉 Think of it as a box that can hold multiple variables of different types. 🔑 Why Use struct? Without struct, if you want to store details of […]

The scanf() function returns the number of inputs successfully read. You can use this to check whether the user gave valid input. 🛠 Example: Check for a Valid Integer 🔍 What’s Happening: Step Explanation scanf(“%d”, &age) Reads the user input. result = scanf(…) Stores how many items were successfully read. if (result == 1) If […]

In C, we use the scanf() function to read input from the user. Just like printf() prints to the screen, scanf() gets data from the keyboard. ✏️ Example: Ask the User for Their Age 🔍 Explanation: Line What It Does int age; Declares a variable age to store an integer. printf(“Enter your age: “); Prints […]