Example for https://essential-go.programming-books.io/functions-6464727799a04611a891be7ca4877f8c (made with https://codeeval.dev)

main.go

// :collection Essential Go
package main

import (
	"fmt"
)

// :show start
// addCheckOverflow adds two int16 numbers and additionally
// returns true if the result overflowed
func addCheckOverflow(a, b uint16) (uint16, bool) {
	res := a + b
	didOverflow := res < a || res < b
	return res, didOverflow
}

func main() {
	res, didOverflow := addCheckOverflow(1, 3)
	fmt.Printf("%5d + %5d = %5d, did overflow?: %v\n\n", 1, 3, res, didOverflow)
	res, didOverflow = addCheckOverflow(65520, 10000)
	fmt.Printf("%5d + %5d = %5d, did overflow?: %v\n", 65550, 10000, res, didOverflow)
}

// :show end