Question

How to get the number of bytes of a variable in Go

Answer 1

package main

import (
	"fmt"
	"unsafe"
)

func main() {
	var i int
	var s string
	var f32 float32
	var f64 float64

	fmt.Printf("Size of int: %d bytes\n", unsafe.Sizeof(i))
	fmt.Printf("Size of string: %d bytes\n", unsafe.Sizeof(s))
	fmt.Printf("Size of float32: %d bytes\n", unsafe.Sizeof(f32))
	fmt.Printf("Size of float64: %d bytes\n", unsafe.Sizeof(f64))
}


/*
run:

Size of int: 8 bytes
Size of string: 16 bytes
Size of float32: 4 bytes
Size of float64: 8 bytes

*/

 

70+ SQL courses for beginners and professionals