C Standard Library Functions

• C is a popular programming language that comes with a standard library that provides various functions for performing common tasks.
• These functions are included in various header files, each serving a specific purpose.

Standard Library Functions in C

• stdio.h
• stdlib.h
• conio.h
• ctype.h
• math.h
• string.h

<stdio.h> - Input/Output Functions

• #include <stdio.h>: This line includes the standard I/O header.
• printf(): This function is used to print text to the console.
• "\n": Represents a newline character for formatting.

<stdlib.h> - Standard Library Functions

• srand(time(NULL)): Seeds the random number generator with the current time, ensuring different sequences of random numbers each time you run the program.
• rand(): Generates a random numbers
• % 100: Limits the range to 0-99.

<conio.h> - Console Input/Output Functions (DOS/Windows)

• Note: <conio.h> is not a part of the C standard library and is platform-specific.
• It's mainly used for older DOS/Windows environments. Modern compilers may not support it.

<ctype.h> - Character Handling Functions

• The ctype.h header file provides functions for character handling.

• isdigit (ch): Checks if the character is a digit.

<math.h> - Mathematical Functions

• The math.h header file provides mathematical functions.

• sqrt(number): Computes the square root of a number.

<string.h> - String Functions

• The string.h header file provides functions for string manipulation.

• strcat(str1, str2): Concatenates str2 to the end of str1.

Command Line Arguments

• Command line arguments are parameters passed to a program when it's run in the terminal.

Conclusion