Go Fundamentals

Basic program structure

Like,other programming language each go program has a main function which is the entry point of the application.

import "fmt"

package main

func main(){
  fmt.Println("Hello World")
}

Variables

in go we can define the variables with the var keywords, we can define the variable with the multiple ways.

Explicit Types

We can define the variable type explicitly with the var keywords.

var name string="Software Development with Golang"

Implicit Types

If we have not defined the variable type it will implicitly define its type on variable initialization.

var age=12

here if we try to assign the string value to the age it will through the error because its type is int implicitly declared while the varible is assigned.

Short variable

we can declare variable with the short hand operators as well.so the basic sytax is as follows.

username,role,is_active:="kodega2016","software developer",true

Multi Types

another way to declare variables in Golang.

var (
  company_name string="PortPro Nepal"
  company_size int=100
  company_address string="Sanepa,Nepal"
)

Conditionals

We can use if,else,if else for conditionals statement like other programming languages.

If statement

age:=10
if age<18{
  fmt.Println("you are not allowed to visit this site.")
}

IF-Else statement

age:=18
if age<10{
  fmt.Println("you are child")
}else if(age>10 && age<20){
  fmt.Println("you are a teenager")
}else{
  fmt.Println("you are a mature")
}

Switch case

we can switch case for multiple conditionals checks.

role:="developer"
switch(role){
case "admin":
  fmt.Println("you are an admin")
  break;
case "developer":
  fmt.Println("you are a developer")
  break;
default:
  fmt.Println("you are our guest")
}

In switch statement,there is a way t