convert float to byte slice

float2byteslice.go

package main

import (
	"fmt"
	"unsafe"
)

func main() {
	var a = float32(-10.3)
	var b = uintptr(unsafe.Pointer (&a))

	var c = make([]byte, unsafe.Sizeof(a))

	for i := 0; i < len(c); i ++ {
		c[i] = byte(*((*byte)(unsafe.Pointer (b))))
		b = b + uintptr(1)		
	}

	for i := 0; i < len(c); i++ {
		fmt.Printf("%b ", c[i])
	}

	fmt.Println()

	var f = new(float32)
	var fu = uintptr(unsafe.Pointer (f))

	for i := 0; i < len(c); i ++ {
		*(*byte)(unsafe.Pointer(fu)) = c[i]
		fu = fu + uintptr(1)
	}

	fmt.Printf("%f ", *f)
}

Output

11001101 11001100 100100 11000001 
-10.300000