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I'm trying to add a value to a variable string in golang, without use printf because I'm using revel framework and this is for a web enviroment instead of console, this is the case:
data := 14 response := `Variable string content` so I can't get variable data inside variable response, like this
response := `Variable string 14 content` Any idea?
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Using += operator or String append: In Go strings, you are allowed to append a string using += operator. This operator adds a new or given string to the end of the specified string. Using Join() function: This function concatenates all the elements present in the slice of string into a single string.
name := initialvalue is the short hand syntax to declare a variable. The following program uses the short hand syntax to declare a variable count initialized to 10 . Go will automatically infer that count is of type int since it has been initialized with the integer value 10 .
To print a variable's type, you can use the %T verb in the fmt. Printf() function format. It's the simplest and most recommended way of printing type of a variable. Alternatively, you can use the TypeOf() function from the reflection package reflect .
var keyword in Golang is used to create the variables of a particular type having a proper name and initial value. Initialization is optional at the time of declaration of variables using var keyword that we will discuss later in this article.
Why not use fmt.Sprintf?
data := 14 response := fmt.Sprintf("Variable string %d content", data) I believe that the accepted answer is already the best practice one. Just like to give an alternative option based on @Ari Pratomo answer:
package main import ( "fmt" "strconv" ) func main() { data := 14 response := "Variable string " + strconv.Itoa(data) + " content" fmt.Println(response) //Output: Variable string 14 content } It using strconv.Itoa() to convert an integer to string, so it can be concatenated with the rest of strings.
Demo: https://play.golang.org/p/VnJBrxKBiGm
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