How to Print a Map in Go - Step by Step Examples

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How to Print a Map in Go ?

Answer

To print a map in Go, you can iterate over the map using a for range loop to print each key-value pair.

✐ Examples

1 Printing a Map Using for Range Loop

We can print a map in Go by iterating over the map using a for range loop and printing each key-value pair.

For example,

We start by declaring and initializing a map named myMap with some key-value pairs. In this example, the map has string keys and integer values.
We use a for range loop to iterate over each key-value pair in the map. The loop variables key and value represent each key and value in the map.
Inside the loop, we print the key and value of each pair using the fmt.Printf function.

Go Program

package main

import "fmt"

func main() {
    // Declare and initialize a map
    myMap := map[string]int{
        "one": 1,
        "two": 2,
        "three": 3,
    }

    // Print the map using a for range loop
    for key, value := range myMap {
        fmt.Printf("%s: %d\n", key, value)
    }
}

Output

one: 1
two: 2
three: 3

2 Printing a Map Using Iteration Over Keys

We can print a map in Go by iterating over the keys of the map and printing each key-value pair.

For example,

We start by declaring and initializing a map named myMap with some key-value pairs. In this example, the map has string keys and integer values.
We use a for range loop to iterate over the keys of the map. The loop variable key represents each key in the map.
Inside the loop, we use the key to get the corresponding value from the map and print the key-value pair using the fmt.Printf function.

Go Program

package main

import "fmt"

func main() {
    // Declare and initialize a map
    myMap := map[string]int{
        "one": 1,
        "two": 2,
        "three": 3,
    }

    // Print the map by iterating over the keys
    for key := range myMap {
        fmt.Printf("%s: %d\n", key, myMap[key])
    }
}

Output

one: 1
two: 2
three: 3

3 Printing a Map Using Iteration Over Map Entries

We can print a map in Go by iterating over the map entries and printing each key-value pair.

For example,

We start by declaring and initializing a map named myMap with some key-value pairs. In this example, the map has string keys and integer values.
We use a for range loop to iterate over the map entries. The loop variables key and value represent each key and value in the map.
Inside the loop, we print the key and value of each pair using the fmt.Println function.

Go Program

package main

import "fmt"

func main() {
    // Declare and initialize a map
    myMap := map[string]int{
        "one": 1,
        "two": 2,
        "three": 3,
    }

    // Print the map by iterating over the map entries
    for key, value := range myMap {
        fmt.Println(key, ":", value)
    }
}

Output

one : 1
two : 2
three : 3

Summary

In this tutorial, we learned How to Print a Map in Go language with well detailed examples.

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How to Print a Map in Go - Step by Step Examples