C Pointer Arithmetic
1. What is Pointer Arithmetic? Pointer arithmetic allows you to move a pointer through memory based on the size of the data type it points to. You can perform arithmetic operations like: Increment: ptr++...
Category: C Tutorial
C Pointers and Arrays
1. Array Name as a Pointer In C, the name of an array is treated as a pointer to its first element. That means:
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int numbers[5] = {10, 20, 30, 40, 50}; int *ptr = numbers; // same as int *ptr = &numbers[0]; |
numbers → address of the first element (numbers[0])...
C Pointers
1. What is a Pointer? A pointer is a variable that stores the memory address of another variable. Instead of holding a value directly, it holds where the value is stored. Syntax:
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data_type *pointer_name; |
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C Memory Address
1. What is a Memory Address? Every variable in C is stored at a specific location in memory. The memory address is the location where the variable’s value is stored. You can find the...
C User Input
1. Basic Input Functions In C, user input is mainly taken using: scanf() → Reads formatted input getchar() → Reads a single character gets() → Reads a string (unsafe, avoid using) fgets() → Reads...
C String Functions
1. Include the Header #include <string.h> All standard string functions are defined in <string.h>. 2. Common C String Functions Function Description Example strlen(str) Returns the length of a string (excluding \0) int len =...
C Special Characters
1. What are Special Characters in C? Special characters are prefixed with a backslash \. They are used for newline, tab, quotes, backslash, etc. Mainly used in strings and character constants. 2. Common Special...
C Multidimensional Arrays
1. What is a Multidimensional Array? A multidimensional array is an array of arrays. The most common is a 2D array, which can be thought of as a table with rows and columns. Syntax...
C Arrays – Real-Life Examples
1. Storing Marks of Students Suppose you have 5 students and want to store their marks. Instead of creating 5 separate variables, use an array:
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#include <stdio.h> int main() { int marks[5] = {85, 90, 78, 92, 88}; for (int i = 0; i < 5; i++) { printf("Student %d: %d marks\n", i + 1, marks[i]); } return 0; } |
Output: Student 1: 85 marks Student 2:...