Golang React JS Technology Blog

Creating Instances of Struct Types

The var keyword initializes a variable rect. Using dot notation, values are assigned to the struct fields.

Example

package main
 
import "fmt"
 
type rectangle struct {
	length  int
	breadth int
	color   string
 
	geometry struct {
		area      int
		perimeter int
	}
}
 
func main() {
	var rect rectangle // dot notation
	rect.length = 10
	rect.breadth = 20
	rect.color = "Green"
 
	rect.geometry.area = rect.length * rect.breadth
	rect.geometry.perimeter = 2 * (rect.length + rect.breadth)
 
	fmt.Println(rect)
	fmt.Println("Area:\t", rect.geometry.area)
	fmt.Println("Perimeter:", rect.geometry.perimeter)
}
The struct is printed to the terminal, showing the values have been assigned.
Most Helpful This Week
Golang HTTP GET request with parameters Undefined <variable/function> error in Golang Golang program for implementation of Knuth–Morris–Pratt (KMP) Algorithm How to check specific field exist in struct? Program in Go language to Program to Add Two Matrix Using Multi-dimensional Arrays How to declare Interface Type in Go Programming Language How do you send an HTTP PUT request in Go? How to create Slice using new keyword in Golang? Golang program to read XML file into struct How to Convert string to integer type in Go?