Golang : How to check variable or object type during runtime?



Tags : golang object-variable-type kind type-of reflect

Problem :

You need to determine the type of data your program is getting from the user input or the variable type during runtime. How to do that?

Solution :

Use the reflect package's TypeOf(x).Kind() function. For example :

 package main

 import (
 "fmt"
 "reflect"
 )

 func main() {

 x := 1

 typeX := reflect.TypeOf(x).Kind()

 fmt.Println("X is type of : ", typeX)

 y := float64(108.08)

 typeY := reflect.TypeOf(y).Kind()

 fmt.Println("Y is type of : ", typeY)

 s := "hey!"

 typeS := reflect.TypeOf(s).Kind()

 if typeS == reflect.String {
 fmt.Println("Variable S is type string!")
 }
 }

Output :

X is type of : int

Y is type of : float64

Variable S is type string!

Affiliate :

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Tags : golang object-variable-type kind type-of reflect

By Adam Ng

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