Go Declare Multiple Variables
Efficient ways to declare multiple variables at once
📋 Multiple Variable Declaration
Go allows you to declare multiple variables in a single statement, making your code cleaner and more efficient when working with related data values together.
// Declare multiple variables at once
var name, city string = "Alice", "Boston"
var age, score int = 25, 95
fmt.Println(name, city, age, score)
Output:
Alice Boston 25 95
Multiple Declaration Methods
Same Type
Multiple variables of same type
var a, b, c intMixed Types
Variables with different types
var name, age = "John", 30Block Declaration
Group declarations in blocks
var (
x int
y string
)Short Multiple
Short syntax for multiple vars
x, y := 10, "hello"🔹 Same Type Multiple Declaration
Declare multiple variables of the same type:
// Multiple variables of same type
var firstName, lastName, middleName string
var x, y, z int
var price1, price2, price3 float64
// Assign values
firstName, lastName, middleName = "John", "Doe", "Michael"
x, y, z = 10, 20, 30
price1, price2, price3 = 19.99, 29.99, 39.99
fmt.Printf("Name: %s %s %s\n", firstName, middleName, lastName)
fmt.Printf("Coordinates: (%d, %d, %d)\n", x, y, z)
fmt.Printf("Prices: $%.2f, $%.2f, $%.2f\n", price1, price2, price3)Output:
Name: John Michael Doe
Coordinates: (10, 20, 30)
Prices: $19.99, $29.99, $39.99
🔹 Mixed Type Multiple Declaration
Declare multiple variables with different types:
// Mixed types with values
var studentName, grade = "Alice", 'A'
var age, gpa = 20, 3.85
var isEnrolled, hasScholarship = true, false
fmt.Printf("Student: %s\n", studentName)
fmt.Printf("Grade: %c, Age: %d\n", grade, age)
fmt.Printf("GPA: %.2f\n", gpa)
fmt.Printf("Enrolled: %t, Scholarship: %t\n", isEnrolled, hasScholarship)Output:
Student: Alice
Grade: A, Age: 20
GPA: 3.85
Enrolled: true, Scholarship: false
🔹 Block Declaration
Group multiple variable declarations in a block:
// Block declaration for better organization
var (
companyName string = "TechCorp"
employeeCount int = 150
revenue float64 = 2500000.50
isPublic bool = true
founded int = 2010
)
fmt.Printf("Company: %s\n", companyName)
fmt.Printf("Employees: %d\n", employeeCount)
fmt.Printf("Revenue: $%.2f\n", revenue)
fmt.Printf("Public: %t, Founded: %d\n", isPublic, founded)Output:
Company: TechCorp
Employees: 150
Revenue: $2500000.50
Public: true, Founded: 2010
🔹 Short Multiple Declaration
Use short syntax for multiple variables (inside functions):
func main() {
// Short multiple declaration
productName, price := "Smartphone", 699.99
quantity, inStock := 25, true
category, brand := "Electronics", "TechBrand"
fmt.Printf("Product: %s by %s\n", productName, brand)
fmt.Printf("Category: %s, Price: $%.2f\n", category, price)
fmt.Printf("Stock: %d units, Available: %t\n", quantity, inStock)
// Multiple assignment to existing variables
productName, price = "Tablet", 399.99
fmt.Printf("Updated: %s - $%.2f\n", productName, price)
}Output:
Product: Smartphone by TechBrand
Category: Electronics, Price: $699.99
Stock: 25 units, Available: true
Updated: Tablet - $399.99