Question

How to print two dimensional (2D) slice in Go

Answer 1

package main

import "fmt"

func main() {
	slice := [][]int{{1, 2, 3},
		             {4, 5},
		             {6, 7, 8, 9},
	}
	
	fmt.Println(slice)
	fmt.Println(slice[0])
	fmt.Println(slice[0][2])
	fmt.Println()
	
	for i, row := range slice {
		for j, _ := range row {
			fmt.Printf("%2d", slice[i][j])
		}
		fmt.Println();
	}
}
 
 
 
/*
run:

[[1 2 3] [4 5] [6 7 8 9]]
[1 2 3]
3

 1 2 3
 4 5
 6 7 8 9
  
*/

 

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Answer 2

package main

import "fmt"

func main() {
	slice := [][]int{{1, 2, 3},
		             {4, 5},
		             {6, 7, 8, 9},
	}
	
	fmt.Println(slice)
	fmt.Println(slice[0])
	fmt.Println(slice[0][2])
	fmt.Println()
	
	for index, element := range slice{
        fmt.Println(index,"-", element)
    }    
}
 
 
 
/*
run:

[[1 2 3] [4 5] [6 7 8 9]]
[1 2 3]
3

0 - [1 2 3]
1 - [4 5]
2 - [6 7 8 9]
  
*/

 

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Answer 3

package main
 
import "fmt"
 
func main() {
    slice := [][]int{{1, 2, 3},
                     {4, 5},
                     {6, 7, 8, 9},
    }
     
    fmt.Println(slice)
    fmt.Println(slice[0])
    fmt.Println(slice[0][2])
    fmt.Println()
     
    for _, row := range slice {
		for _, val := range row {
			fmt.Printf("%2d", val)
		}
		fmt.Println()
	}
}
  
  
  
/*
run:
  
[[1 2 3] [4 5] [6 7 8 9]]
[1 2 3]
3

 1 2 3
 4 5
 6 7 8 9
  
*/

 

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