Function declaration

Context

Functions in Go are declared with the func keyword, followed by the function name, parameters (with types), and return types (if any). Parameters and return types are mandatory. Go functions can return multiple values.

Example

Declare a simple function that adds two integers.

Code example

package main

import "fmt"

func add(a int, b int) int {
    return a + b
}

// Parameters of the same type can be combined
func multiply(a, b int) int {
    return a * b
}

func main() {
    sum := add(5, 3)
    product := multiply(4, 2)
    fmt.Println("Sum:", sum)
    fmt.Println("Product:", product)
}

Output

Sum: 8
Product: 8

Useful links

• Go spec: Function declarations
• Go by Example: Functions