How to interpolate a number inside a string

Question

The following code

package main  import (     "fmt" )  func main() {     fmt.Println(say(9)) }  func say(num int)(total string){ return fmt.Sprintf("There are %s reasons to code!", num) } 

Produces the following output

There are %!s(int=9) reasons to code! 

My question

What should I do to interpolate a number inside a string?

Answer 1

If you want to always use the "default" representation of no matter what type, use %v as in

fmt.Sprintf("There are %v reasons to code!", num) 

Answer 2

Try %d instead of %s. The d stands for decimal.

The appropriate documentation is here:

http://golang.org/pkg/fmt/