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How do I access command-line arguments in Go? They're not passed as arguments to main.
A complete program, possibly created by linking multiple packages, must have one package called main, with a function
func main() { ... }defined. The function main.main() takes no arguments and returns no value.
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Go by Example: Command-Line ArgumentsArgs provides access to raw command-line arguments. Note that the first value in this slice is the path to the program, and os. Args[1:] holds the arguments to the program. You can get individual args with normal indexing.
To pass command line arguments, we typically define main() with two arguments : first argument is the number of command line arguments and second is list of command-line arguments. The value of argc should be non negative. argv(ARGument Vector) is array of character pointers listing all the arguments.
If you want to pass command line arguments then you will have to define the main() function with two arguments. The first argument defines the number of command line arguments and the second argument is the list of command line arguments.
You can access the command-line arguments using the os.Args variable. For example,
package main import ( "fmt" "os" ) func main() { fmt.Println(len(os.Args), os.Args) } You can also use the flag package, which implements command-line flag parsing.
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