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Command Line Arguments in C

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Basic Concepts: Command line arguments are user-passed values that programs can use during execution
Main() function provides facility to handle command line arguments
argc parameter stores total command line arguments including executable name
argv parameter contains character strings of each command line argument
Environment Variables: Main() function can store system environment variables as character strings
Environment variables can be accessed through main() function parameters
Argument Manipulation: Command line arguments can be converted to different data types
Arguments can be passed as file paths for handling operations
Getopt() API: Getopt() API parses command line options
Contains optarg, optopt, and opterr internal variables
Handles mandatory and optional command line options
Returns '?' for invalid options or missing mandatory options