How to use print type of variable in Go?

In Go, to print the type of a variable, you can use the TypeOf function from the reflect package. reflect.TypeOf returns a reflect.Type object representing the type of the variable. It is commonly used in conjunction with the fmt package to output type information. Here is a specific example:

go
package main

import (
	"fmt"
	"reflect"
)

func main() {
	// Define several variables of different types
	var a int = 10
	var b float64 = 3.14
	var c string = "hello"
	var d bool = true

	// Print the type of each variable
	fmt.Println("Type of a:", reflect.TypeOf(a))
	fmt.Println("Type of b:", reflect.TypeOf(b))
	fmt.Println("Type of c:", reflect.TypeOf(c))
	fmt.Println("Type of d:", reflect.TypeOf(d))
}

In this example, we define four variables of different types: integers, floating-point numbers, strings, and booleans. By using the reflect.TypeOf function, we can obtain the type of each variable and print it using fmt.Println. This method is particularly useful during debugging, especially when you need to confirm variable types or when working with interfaces and reflection.

Running the above code will output:

shell
Type of a: int
Type of b: float64
Type of c: string
Type of d: bool

Each output clearly displays the type of the corresponding variable. This technique is very practical in development, especially when dealing with complex data structures and interfaces, as it allows for quick identification and confirmation of data types.