theGoProgrammingLanguageBook/exercise1-1_echoWithCommand.go at main · mmert9008/theGoProgrammingLanguageBook · GitHub

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package main

// Exercise 1.1:  Modify the echo program to also print os.Args[0], the name of the command that invoked it.

import (
	"fmt"
	"os"
)

func main() {
	var s, sep string
	for i := 0; i < len(os.Args); i++ {
		s += sep + os.Args[i]
		sep = " "
	}
	fmt.Println(s)
}

/*
package main

import (
	"fmt"
	"os"
)

func main() {
	var s, sep string
	for i := 1; i < len(os.Args); i++ {
		s += sep + os.Args[i]
		sep = " "
	}
	fmt.Println(s)
}
*/

/*
package main

import (
	"fmt"
	"os"
)

func main() {
	s, sep := "", ""
	for _, arg := range os.Args[1:] {
		s += sep + arg
		sep = " "
	}
	fmt.Println(s)
}
*/

/*
package main

import (
	"fmt"
	"os"
	"strings"
)

func main() {
	fmt.Println(strings.Join(os.Args[1:], " "))
}
*/