Variable Declarations, Short Variable Syntax (:=) & Scope

1Concept

Inside functions, := declares and infers variable types. Outside functions, var is required. Variables are block-scoped {}.

2Architecture Diagram

score := 100 // Short declaration inside function
var GlobalConfig = "Active" // Package-level declaration

3Code Example

package main

import "fmt"

const AppName = "CareerAI High-Speed Engine"

func main() {
    shortDeclared := "Inferred String"
    number, valid := 42, true // Multiple assignment

    fmt.Println(AppName)
    fmt.Printf("Short: %s, Number: %d, Valid: %t\n", shortDeclared, number, valid)
}

4Expected Output

CareerAI High-Speed Engine
Short: Inferred String, Number: 42, Valid: true

5Key Takeaways

• ✓:= is only valid inside function bodies.
• ✓Capitalized names (AppName) are exported (public); lowercase names are private to package.
• ✓Multiple variables can be declared and initialized on a single line.