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Command-line arguments and flags
source link: https://yourbasic.org/golang/command-line-arguments/
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Command-line arguments and flags
yourbasic.org/golang
The os.Args variable
holds the command-line arguments – starting with the program name –
which are passed to a Go program.
func main() {
if len(os.Args) != 3 {
fmt.Println("Usage:", os.Args[0], "PATTERN", "FILE")
return
}
pattern := os.Args[1]
file := os.Args[2]
// ...
}$ go build grep.go
$ ./grep
Usage: ./grep PATTERN FILEFlag parsing
The flag package implements basic command-line flag parsing.
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