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Go Lang Basics Part 1

Part 1 Golang Basics and Fundamentals

Golang, also known as Go, is a free and open-source programming language. It's known for being:

  • Simple and easy to learn: Go syntax is clean and straightforward, making it a good choice for beginners.
  • Fast and efficient: Go code compiles quickly and produces efficient machine code.
  • Concurrent: Go excels at handling multiple tasks simultaneously, making it suitable for building web applications.

Here's a breakdown of some essential Go concepts to get you started:

  1. Variables and Data Types:
    • Variables store data in your program. You declare them with a name and data type (e.g., integer, string).
    • Example:
      package main

import "fmt"

func main() {
    var userName string = "Fajar"  // String variable
    var age int = 30               // Integer variable
    fmt.Println("Hello,", userName, "you are", age, "years old.")
}
  2. Functions:
    • Functions are reusable blocks of code that perform specific tasks. They can take inputs (parameters) and return outputs.
    • Example:
      package main

import "fmt"

func greet(name string, age int) {
    fmt.Println("Hello,", name, "you are", age, "years old.")
}

func main() {
    greet("Fajar", 30)
}
  3. Control Flow:
    • Control flow statements dictate how your program executes. Common examples include if/else statements and loops (for, while).
    • Example (checking eligibility to vote):
      package main

import "fmt"

func main() {
    age := 20
    if age >= 18 {
        fmt.Println("You are eligible to vote.")
    } else {
        fmt.Println("You are not eligible to vote yet.")
    }
}
  4. Packages:
    • Packages are reusable blocks of Go code. They help organize your code and improve maintainability.
    • Example: You'll typically use packages from the Go standard library (like fmt for formatted printing) and potentially external libraries (like fiber for web development).
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