Converting from an integer to its binary representation

Question

Has anyone got an idea if there is any inbuilt functionality in Go for converting from any one of the numeric types to its binary number form.

For example, if

Answer 1

An alternate way for the accepted answer would be to simply do

s := fmt.Sprintf("%b", 123)
fmt.Println(s)                 // 1111011

For a more rich representation you can use the unsafe package(strongly discouraged) as

a := int64(123)
byteSliceRev := *(*[8]byte)(unsafe.Pointer(&a))
byteSlice := make([]byte, 8)
for i := 0; i < 8; i++ {
    byteSlice[i] = byteSliceRev[7 - i]
}
fmt.Printf("%b\n", byteSlice)

This works for negative integers too.