Golang Accessing Elements from Map

In this tutorial, we will learn how to access specific element from a Map by using key of the map along with the working examples of it. As we know GO Map will store the key-value pair type of data.

Accessing Items

In the Go language, we can access the map values by using the map key.

Syntax: 

map[key]

Access Map Example 1:

Let us create a map named manager with 2 key-value pairs and access them.

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package main
import ("fmt")
   
func main() {
    // Create an empty map such that key stores string type values, 
    //value stores integer type values and add 2 key-value pairs.
	var manager = map[string]int{"Sravan":23,"Anil":35}

	// Display the map
	fmt.Println(manager)      
	
	// Access value of "Sravan"
	fmt.Println("Sravan Age:",manager["Sravan"])  
	
	// Access value of "Sravan"
	fmt.Println("Anil Age:",manager["Anil"])  
}

Output:

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map[Anil:35 Sravan:23]
Sravan Age: 23
Anil Age: 35

The values were returned based on the key. Suppose, if there is no key and if we try to return it, 0 is returned as value.

Access Map Example 2:

Let us create a map named manager with 2 key-value pairs and access unknown value.

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package main
import ("fmt")
   
func main() {
    // Create an empty map such that key stores string type values, 
    //value stores integer type values and add 2 key-value pairs.
	var manager = map[string]int{"Sravan":23,"Anil":35}

	// Display the map
	fmt.Println(manager)      
	
	// Access value of "Ramya"
	fmt.Println("Ramya Age:",manager["Ramya"])  
	
}

Output:

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map[Anil:35 Sravan:23]
Ramya Age: 0

Explanation for the above output:

The value is 0 because, Ramya not exists in the map.

Access Map Example 3:

Let us create a map named fruits with 5 key-value pairs and access them.

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package main
import ("fmt")
   
func main() {
    // Create an empty map such that key and value stores string type // values and add 5 key-value pairs.
	var fruits = map[string]string{"apple":"guntur","guava":"nepal","banana":"guntur","grapes":"hyd","papayya":"hyd"}

	// Display the map
	fmt.Println(fruits)      
	
	// Access value of "apple"
	fmt.Println("Apple Area:",fruits["apple"])  
	
	// Access value of "guava"
	fmt.Println("Guava Area:",fruits["guava"])  
}

Output:

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map[apple:guntur guava:nepal banana:guntur grapes:hyd papayya:hyd]
Apple Area: guntur
Guava Area: nepal

Explanation for the above output:

The values were returned based on the key.

Conclusion:

Now we know how to return the values present in the Go Map using key and understood the implementation with working examples.